As a former collegiate gymnast myself, I happen to know that you don't have a long time to meditate (in the gymnastics world, it's called visualizing your routine) before it's your turn to compete. Being able to get into a meditative state quickly can make or break your performance. Take to long, and you don't reach the state, and are more prone to errors. Almost all of the high level gymnasts visualize every routine they do, with varying degrees of success.
As you pointed out, Jason's goal does only average at about 5 minutes a day. But that's more time than a gymnast usually has (unless he wants to dismiss his teammate's routines, which is not exactly... nice). So for him, 5 minutes may be all he needs to reap the benefits, whereas someone who hasn't had the training to quickly get into that state may need more time.
As a former collegiate gymnast myself, I happen to know that you don't have a long time to meditate (in the gymnastics world, it's called visualizing your routine) before it's your turn to compete. Being able to get into a meditative state quickly can make or break your performance. Take to long, and you don't reach the state, and are more prone to errors. Almost all of the high level gymnasts visualize every routine they do, with varying degrees of success.
As you pointed out, Jason's goal does only average at about 5 minutes a day. But that's more time than a gymnast usually has (unless he wants to dismiss his teammate's routines, which is not exactly... nice). So for him, 5 minutes may be all he needs to reap the benefits, whereas someone who hasn't had the training to quickly get into that state may need more time.