I'm not sure if i quite understand what you're having a problem w/. If you use preform AV correctly everyone gets queued instantly when the leader of the raid queues. BUT, keep in mind that doesnt guarantee everyone will get the same instance number. But the raid leader has the ability to drop everyone if not enough get the same instance. If you dont know, everyone in the raid has to have the battlemaster window open for it to work (the last time i used it). However the leader of the raid can see who does and does not have it open.

I dont know if this helps or not. Hopefully im not telling you something you already know, but i dont know why else you wouldnt get queued up fast enough unless your raid isnt using it correctly. It sounds more to me like the raid leader isnt familiar w/ what he is doing on Preform AV Enabler. If the raid leader knows what he is doing, he can see everything he needs to know before queueing everyone up and if they need to redo it if not enough get the same queue.

Btw, its been a few months since i last used preform AV so please forgive me if they've changed anything on it since. But i dont know why they would change some of those basic things that you kind of need to know as a raid leader.

Edit: Or you could just try what kayley said if you're 5 boxing. In essence Preform doesnt do anything but queue everyone up at the same time anyways. So if you could get your 5 man queued as a group at the same time they do you would be doing the same thing basically. The only difference is you would have to manually make sure you get the same instance as the raid does before you enter.