I've seen at least 3 pairs of Grado at my campus already, a SR325is and 2 SR80/125. Don't really understand why someone would take them outside when they are open and leak sound so badly.
That being said the only Grado that has impressed me is the RS1i...warm and smooth, even RS2i can't touch that. The SR line are a pain to deal with, physically and acoustically with their shallow pads and treble spikes :(
I couldn't careless about that since I bring my HE-500, AKG701 and ATH AD2000 outside anytime.