Unfortunately so and word is, via the engineer who replies on Arstechnica's Mac section, is that iOS movement to 64bit is of higher priority due to the date set by Apple that all software upgrades and updates through the iOS App store have to be 64bit. As for when Office for Mac will move to 64bit, given the slowness of even getting to the half baked build we have today I wouldn't hold my breath that'll appear in the next couple of years.