u know the reason y defenders r so 'fast' is cuz of shirt grabbing. That's right believe it or not, this has been in the game since Pes4, but they made it harder in Pes5. I've scored some incredible dribbling goals with Giggs and C.Ronaldo on 5* and 6* cpu, in which I'd catch them on a counter and run more than 1/2 the length of the pitch, blowing past defenders 1 by 1. This is not in ML so their speed doesn't develop, and with their default stats, which they're hardly the speediest of players.
The secret? U need a distance at which they can't grab ur shirt. So many ways to gain that advantage. The most effective way is to get them to commit to a tackle by getting close and then sidestepping. Or u can just jog straight at the defender and at the last second go diagonal and he'll blow past them. Remember, :R1: is evil ok, it is not used to dribble. If u hold :R1: u'll get tripped. If u don't, u'll do wonderful things and u can ride tackles and really blow past defenders. Then once u got that space, now is the time for :R1: and they won't catch up. With good dribblers u don't need to keep tapping to send the ball forward, thats only for poor dribblers with good speed.
Go practise it now and u'll see who is at fault. Threads like these make me wanna make a demonstration video of a full match, in which I would consistently perform everything that u guys complain about, and show u the proper way to perform them. How to properly leave defenders in the dust, cross efficiently, win 50/50 balls, overpower the attacker and win the ball without committing fouls.