Every manufacturer has a few lines of lemons. Apple for instance had a few generations of iBooks where the graphics chip would come loose (since it was placed unprotected under the wrist rest), everyone who I've ever known with a plastic MacBook (5+ people) had the front plastic crack, one generation of MacBook Pro 15" had an issue where the LCD would randomly turn on with every other row of LED lighting turned off (so it looked like stage lighting), and then of course the classic "mooing" MacBook.
This is why anecdotal evidence is difficult to take to heart - it's always black and white.
I love my Lenovo t400s. I went around the world with it, dropped it, smashed it, and just did terrible things to it. And yet, it keeps on chugging along. My t400s is like a car that never wants to die. The consumer in me wants to upgrade but I can't find a sensible reason to do so.
It's like my mother: always present, reliable and stable. It's the only piece of hardware that ever made me smile.
I'm a lenovo fan fo lyfe!