Wheel Bearing Problem.. What does it mean?

Hi,
I just got my 1996 SVX , and it only has 30,000 miles in it.
But already, my rear wheel bearings need to be replaced.
What does this mean? The old owner drove this car pretty
hard? Or is it that the SVX just has poor wheel bearing
problems? I thought it was only the 1992 SVX's that had
this problem.

Thanks.