[keithwalton]

Rear wings are designed to be changed fast (though nothing compared to fronts) it could be argued that the replacement wing was actually stronger than the one that came off *before* it was broken. As the new wing is well that new, the other would have done at least 6 laps allready from qualyfying, probably more as unless they have a wear issue it would stay on all weekend.
Rear wing faliures rarely occur at the mounting points themselves though entire mounts have been known to come unstuck. We havent seen this for a few years now though we have seen elements fracture and detach in quite spectacular fashion (mclaren and jordon have experienced this recently)

If you watched qualy you'd of seen the toyota crew fixing zonta's car after he went off in pre-q, that involved quite alot of changes. with enough people power you can change most stuff in 10-15 mins, including an engine, though rarely happens in a race because you'd fall to far behind. If the race has a high attrition of cars it has been known for cars to be in the pits for 15mins + then go out and try and score some pts