http://www.youtube.com/watch?v=cHtSxxopWSAExpert players don't wall with stone that often anyway (I don't say thay never do it, but it's rare and it is situational, eg a team wall to protect a trade route), they go palissades/buildings. I got the inverse feeling of that experts want walling time to be nerfed, especially the Stone one. Carlos tells me that TheViper for example liked that the Stone Wall building time was nerfed in AoFE.
Expert AoC players do wall especially the green player just like this game shows. Viper is among a minority of the experts that agrees with Stone Wall building time nerf by +3 seconds, especially Carlos Ferdinand who wants the Stone Walls nerfed even more, since he usually plays as the Goths and other infantry civs. Which is why he likes to M@As rush a lot and walls give him a hard time so he is really biased when it comes to infantry civs and units. Still the the majority of AoC experts and players oppose walling nerf, just like predator145 said, even the guy that Carlos quoted L_Clan_Bender agrees with me. +3 seconds is too much +2 seconds for stone wall is just right.
* Stone walls take +2 seconds to build (i think 2sec and 3sec are to much)