I had a center diff go out at about 98,000, but it doesn't seem too common. I probably just didn't rotate my tires enough (and I'm sure the donuts didn't help either). Also my a/c compressor was starting to get weak. But being in Texas I used it about 10 months a year for six years..
Stock clutch can wear out, but that's all about how you drive the car.
I don't know about over 100,000 miles, but over all the reliability seems really good.
(I have gone through two OEM subwoffers, those things are a piece)