I've clicked over 2,000 miles on my 2010 Trek 2.3
I'm 5'8" and 230# and it's ridden on fairly smooth roads. After 1 week I took it back to the LBS for a fitting and a new saddle. Other than that, it's not been touched other than chain maintenance. Wheels have remained true and tight, chain still passes the 0.75 test, original tires have each had one flat and they look like they have many more miles in them.
105s shift flawlessly
Comfortable ride with awesome acceleration
Can't see any signs of wear
Original saddle is an insult. I would have thought more of Trek had it come with just a seat post.
The decals are getting on my nerves. "Trek" is on the bike 8 times. When my Wabi is finished I'm sending my roadie out for a media blast and powder coat sans decals.
Bottom line. If it was stolen today, I'd buy another just like it.