Yes, ThinkPads are still some of the most sturdy laptops around while MacBooks tend to need more support/repairs. Of course Apple's (repair) service is very good, and MacBooks do look nice(r), but "build quality" means something else to me.
But I think there's the build quality vs. the durability of the products. For me, Apple products win in build quality in the sense that the pieces are cleanly fabricated, properly aligned, don't wiggle, shake or bend, etc. I've had a ThinkPad and was disappointed from that point of view. Certainly better than many other brands (Dell, Toshiba), but still a bit under Apple.
But as I said, Apple does have some issues of durability. (e.g. MacBook's plastic cases, iPod/iPhone earbuds...)