See, this is the stuff that confuses the hell out of me. Why the feck is he constantly compared with players like Gerrard, Lampard and Ronaldinho when he's scored one goal in his entire United career? They are all prolific goal-scoring midfielders. Anderson couldn't be less like them if he tried.
I also think the reason he tends to perform well in a midfield three is because it's the only way he can play in a team that has two central midfielders on the pitch who know what they're doing. This gives him a free role, which he tends to spend running round the place hassling the opposition, rather than doing anything particularly constructive. This is useful against really tough opponents but pretty pointless against most sides we come up against. It's also is not remotely similar to what Gerrard or Lampard do for their clubs or even what they were doing when they were the same age as Anderson.
There are clearly signs that he has the potential to develop into a really good all-round, box to box, midfielder. However, I've seen zero evidence that he is suited to being some sort of specialist attacking midfielder and I can only assume this myth is based on youtube videos of underage football (which is daft, obviously)