Got my bike last October and put 1400 miles on it with zero flats. Two days ago I put the alloy wheels on from my son's Trek Madone 6.7 to see what light wheels feel like. I put 15 miles on them and when I got home I noticed a split in the tire so the next day I bought a new tire for him. The split was actually a hole, so I was lucky it didn't blow.

That's still zero so far.