I also drove the Q5. Meh! Not nearly the pick-up or overall feel of the BMW. Same-same for the MBZ G and M series, imho.
I also found myself distracted by having to look down far too often to work with the various controls in the Audi and MBZ.
Though off topic, BMW is behind its competition re diesel models in the US, though.
I'm not sure how much power the diesels will be giving up due to downsizing of the engines when those models are released for US purchase.
Consumer Reports didn't specify if it was reviewing the 2012 or 2013 X3, but its reliability was a full 80% below average reliability, which was the lowest in its class. Sad and depressing, by any possible standard.