Well then what is the problem? Clearly it is not isolated to just a few users
I think i need to move back to Full BIS to test as im currently using BIS on the Vodacom BES server so my experience would be different to the average user.
As for the slow speeds, I'm going to ask the RIM solution specialist assigned to VC and see what She says & post back.
If you want you can DM ure BBM PIN and i can check on your profile on RIM's Server.