Ah, well, I have had dozens and dozens of disks go through my pc's/servers over the years. I have been running a storage server for years and thus upgrade once in a while and try to double the capacity when possible. This started with 20GB disks and has now moved to 2TB disks. So I have had 20GB's, 60GB, 120GB, 250GB, 500GB, 1TB, 1.5TB and now 2TB disks in my server (server itself has changed hardware too but in the most recents years I have been using adaptec controllers, so you could call that a constant. ).
I've run from 4 disk RAID5's to 8 disk RAID5's. And have had some failed disks over the years.... treating them quite badly actually.
I run the server 24Hr a day, for weeks on end, then shut it down, put it in the car, drive it to a lanparty, turn it on again for 48Hrs where the disks get trashed, turn it off again and put it back into it's spot where the disks spin again for a few weeks. Well, I can tell you, desktop disks (or any?) are not designed for that kind of usage. Oh, and my cars mostly have subwoofers in the back too, where mostly the server would stand also. Never had any effect on it that I could tell.
But, since I have 3 years warranty mostly, I got by pretty well. Especially Maxtor was my friend with their advanced replacement program! :D Most disks would take 1 tot 1,5 or 2 years of this kind of punishment, in all honesty, the average lifetime you would expect from the disks in power on hours and reads, but normally over much larger time say 5 to 10 years.
Anyway, in all my time with all my type of disks and array's and everything, I have never!!! lost as much data as I did this time. I have never had so many disks just fail, for no apparent reason. And now a days my disks are in nice holders in chieftec hotswap bays, etc. etc.
So no, I am used to having a much better experience. Just like you are from what I get from your story. Sadly disappointed and I am hoping the replacement disks won't fail as horribly too!