They were announced 3 weeks ago as the world's 3rd largest. Now they're the 2nd largest. Unless that article was a typo.
I'm not surprised, the build quality of Lenovo products is very good. I know a few friends who purchased notebooks recently (one for $800 AUD, the other for $850 USD) and they are both very pleased with it. The former used to use a netbook while the later used to use an Asus G73.
That says quite a lot to me, so props to you Lenovo. Just don't let your market position go to your head and start cutting back on quality.