Same thing happened to me, but I have the 130hp zetec-e automatic in a 2000 model year.
AC works great, blows cold, but kills the performance...normal acceleration from a stop light, the car just hangs. I feel sorry for the cars behind me. Granted its only a few seconds longer I guess, but still.
Its not an Acura TL with 260hp or anything, so I just though it was normal.