Unfortunately (and you'll to just have to trust me on this), it was from a PES article in the Official Playstation Magazine, back in the PS2 days. The term "momentum shift" has been used, which is just a bullshitty way of putting it.
The incident in the OP seems like a freak occurrence, but tell me - do you never just feel sometimes that the CPU team is destined to score? Like when they've been shit all game, and they suddenly burst into God mode? Or when your defender inexplicably slows down when you're chasing the striker? Or how about when your right footed striker goes through on goal, with a good opportunity to score with his right food, and then for some reason decides the kick a hopeless awkward effort with his left? Something that a striker would NEVER to in real life. Call them bugs all you like, but as far as I'm concerned, they're examples of the game taking control and fucking up your game.
I really don't understand why they just don't take it (scripting) completely out and let true skill take over, isn't that what most fans want?
I can understand when it's used in an Arcade game, for example the rubber-band physics (scripting) used in Ridge Racer (where whoever went into 1st position would see their car slow-down and the other cars gain an internal speed boost to keep things competitive) when the intention is to suck away your money but when it's still being used as the main form of competitive-gameplay-interaction it just wreaks of lazy programming.
It's the same lazy scripting they use again and again and this time the AI control levels have reached new heights, this is why when I play and my team is doing well I'm always thinking "right at what point are they gonna start playing like turds?"
All in all it just adds up to a big mess of inconsistency and it's Konami's main way to keep the game balanced in terms of being competitive. However, it's really killing the game. No one plays the online PC mode (already) and who can blame them when the game is so messed up? In fact if you don't see scripting then WOW, if you don't see the 'turn' of momentum or know when the computer is going to score then again WOW because in all fairness I would love to be able to not see it too, sadly I can see it as it is simply too blatant to ignore and although I love bits of 15 it is killing the game for me, already I can take or leave it and normally I would be reluctant to make the change to the next series. Hence why I am worried where the game is going.
Thing is, I feel that Konami are aiming the game for younger players, young and pre-teens for when I had my son and his friend play a game they just loved it (although my son kept asking why the cursor wouldn't change in his own words, bless him but the other kid hasn't a clue). The game ended up 2-2 and they thought the whole experience was good fun.
So it makes sense to do this if your age demographic is a lot younger as kids tend to question a lot less AND it keeps the game's competitive for them - hence they will come back to sort out that 2-2 result (ending no doubt in another 2-2 :/)
Anyways, just my personal thoughts - us oldies being phased out.