It swooped me first on anthrax ripple - scared the bejeesus out of me as I was a fair way above gear. A good reason to put in gear even when the climbing is easy.
When it did actually attack I was (luckily) tight to the anchor belaying the second from the top of the lower tier (can't remember the name of the climb - around the corner from AR). It was very quick - came out of a blind spot and the first thing I saw was the huge shape and these evil looking talons wrapping around my calf and dragging, and then it was off. Luckily it mostly got hold of my trousers rather than my leg itself.
Hell of an impressive animal - you woudn't want to be a lamb or even a small child!