Since their collaboration with BT, there are rumours that Orange are putting new joiners on non-LLU only, even when LLU is available at the exchange!.
Maybe it's only when Orange estimate that user will get less than 8 Meg. But Orange's estimates of connection speeds of lines new to them are over-cautious. My LLU line syncs at 16 Meg confirming Orange's estimate of 15.5 Meg. But my other non-BB identical line, which once sync'ed at 16 Meg with O2, is estimated by Orange at only 9.5 Meg.
I am interested in scotching or confirming such rumours.