40 yards! Yikes. Soccer is a series of small space games played on a large field. Rarely is the case where a player has to sprint for 40 yards/meters on his own with a ball at his feet to attack or defend. If that occurs, then there is a serious tactical mistake and you get what you get. If properly played, there is almost no need for a 40 yard sprint. Quick and short touches and accurate passes will move the ball round faster than any human can run.
40 yard runs happen all the time. There’s so many times a game a MF will pop out a long ball to the wings when the opposing D is playing a high press, causing forwards and opposing defenders to take off. The Dutch training method is that a socccer player should be able to do a flat out sprint for 5 seconds (which is about 40 yards), at which point he should shoot or pass.
I'm sure you'll agree with me that the ball moves faster than a player, no matter how fast he is.
Effective speed has to take into an account angles of player off the ball as well as movements prior to receiving the ball. Soccer is not a track event where everyone starts at the same block and runs to the finish line.
You are ignoring the importance of D and winning loose balls. A slow player in space is going to get beat like a drum. And unless they are closest to a loose ball, slow players are going to lose the battle to collect loose balls. Good D and winning loose balls is critical. It’s why I believe, at the youth level, there is really no such thing as a good slow player.
Guys like Xavi and Pirlo function best on teams that have 1) the speed to create space for them, and 2) the skill to maintain possession, so that their liabilities as defenders and inability to win loose balls is not exposed.
Those 2 conditions never exist in US youth soccer. Yes, the good slow player helps create some goals and makes some nice combinations, but if they are caught out of position on D they can’t get back and leave a giant hole on D. And the latter happens A LOT more than the former.
My observation is that the good slow players and their parents are in reality just team killers. They think they are offensive players, and they make tons of “almost”goals with their skills and high soccer IQ, but they rarely finish off plays because faster defenders catch up to them and interfere with their shot. But they are encouraged by their “almost” goals and keep pushing forward to contribute their good, slow skills to the offense. The parents of the good, slow player are also encouraged and think their good, slow player is on the verge of breaking through and cheer him on to push up and “contribute” to the offense. Of course, when the good slow player pushes up but doesn’t score (which is almost always), he can’t get back in time to play D, and a quick goal kick or good chip unleashes a counter where the opposing striker runs through the central hole where the good, slow player should have been. (The good, slow player is almost always a central player.) The good, slow players invariably remember the 2 or 3 beautiful, quality goals they scored, and forget the 15 to 20 counter goals blasting throughout the central hole where they should have been, because it’s not the fault of the good, slow player. He was busy contributing his good, slow skills to the offense, and it’s the responsibility of the fast players to run back and cover for the good, slow player.
After several games of this bullshit, you end up with a team where the good, slow player pushes up at every opportunity, tons of almost goals, no actual goals, the fast players are confused whether they should play offense or defense, whether they should guard their man or the good slow player’s man, and which one of the fast players is supposed to guard the good, slow player’s man.
I’m telling you, stop overthinking this, looking at angles and all this other crap. That kind of stuff only matters if you have speed to take advantage of the opportunities you see. There is only one type of good slow player. A player who always keeps his shape and connection with teammates, never leaves a hole in the D, passes the ball as soon as he can. You will not find him in youth US soccer and it’s just about impossible to develop a good slow player in the US for the reasons I mentioned above.