I don't believe that the regen times are any different than what we saw in AH I. Whats different is the location and the amount of objects that need to be taken down.
What I have seen is ...
Base gets attacked.
Some work on ack, some work on field hangers, and some work on the town.
Now, for most of those who are attacking the buildings at the field, really, at this point have no clue as to what they are attacking cause they aren't use to the field setup yet. So, inadvertantly they knock down a couple of fighter hangers.
Meanwhile, some (very few) are working on the town. Now that the towns are bigger, 1 or 2 guys can really have a hard time clearing it. So, they run out of ammo/ord or get disenchanted and mosey on over to the field looking for some vulches, leaving the town 1/2 to 3/4 down.
Now, another wave shows up maybe 8 to 10 minutes into the original attack, because its harder now to take a base. When the 2nd wave comes in, the objective is to TAKE OUT ALL FHs. Well, there is only 1 FH left and the guy that takes it out thinks that the other 2 were just taken out by the same wave ... not realizing that the other 2 hangers have now been down for 10 or more minutes.
At this point, Mr. Jabo thinks that he has 15 minutes on the clock before FHs come back up. Guess again Mr. Jabo. Next thing ya know, in 5 minutes, 2 FHs pop back up and the screamin' and whinin' start. I THOUGHT FHs were supposed to be down for 15 minutes, not 5 ... what a bunch of BS. Try to explain to them the above scenario and its like talkin' to the wall
Meanwhile, the goon has now arrived. Time to scramble back to the 1/2 to 3/4 destroyed town ... ooops ... did anyone remember that the destruction was done almost 12 minutes ago ... nope .. no way.
Well, now were into the 14th minute and the last tiny little building that most don't even see is finally destroyed. DROP THE DRUNKS ... ALL SET. Now as the tiny little troopers float gently to the ground, the 15 minute clock has just gone past. Whats this ?!?!? Buildings are now popping up like condos on prime shoreline ... I THOUGHT the town was supposed to stay down for 15 minutes ... not 2 minutes ... what a bunch of BS.
Some people never learn.