Wtih R1+R2 (dual shock) you could do the special sprint, as it was in Pes 2012 but I suspect you already know. Plus I rarely use it too.
I think too anyway, that generally it's definitely hard to completely outrun defenders. But personally my impression is that it's more an "environment" matter due to the things I said above (more physical battles, less space, better tackles by defenders that are more reactive etc.) than stats going off as it used to happen in 2011 or other more recent chapters. To carry on your example, with Bale it's still hard to dribble as if the defender X stays tight to my body I feel all his pressure, but once I'm over him I can feel I'm faster than defender X. Maybe to explain myself better, it's more a Pes 5 than a Pes 11 situation, to me

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And by the way, correct me if I'm wrong, but wasn't acceleration substituted in both Pes 12 and Pes 13 by explosive power? I can't see it either in 12.
Anyway you don't happen to play on pc do you? I'd love to find a decent patch for 2012 as I've found in 13 (even if a bit dated). I don't know if it was the same on Ps3 and 360, but on PC they had the horrendous idea to: 1) deprive the games from rain on game 2) putting in this indecent motion blur.
Luckily at least the motion blur can be patched away on both but I wanted to find some complete package for 2012.