True, but its more than that. Its about pressing from the front or not pressing, disrupting the opposition from playing out from the back, its about understanding your role when your team does not have the ball, which changes dependent on where the ball is or what the score is or what stage of the match you are at, versus when you do have the ball, e.g. what's your gegenpress structure versus your hold structure (say switch to a 4-4-2 to just hold the opp.), who is the "lead" in the gegenpress - if you are pressing their defenders this could be the 9 etc.
In short, it can be very complicated but teams that do it well can be very successful. I've seen teams like Liverpool move the opposition defenders through field position until the ball is in their (L) optimal area, and then they press as a team with everyone knowing what their role is, what zones to lock up etc. and force a turnover in the opposition half and in the danger area.