Also, has to do with the type of driving .
High speed with lots of cornering in the
mountains is sure to wear bearings. I've
replaced several rear wheel bearings in
130k miles (on a 2000 Impreza L) but my
mountainous driving style is terrible for
bearings (driving fast in corners, accelerating
uphill, etc).
In more normal driving they should last a
Subaru 100k easily, if not much more.
Basia