THR.com is reporting:
In the first full-season order for a freshman series this season, the CW has picked up nine additional episodes of the teen drama, bringing the total order to 22.
The much buzzed about “90210,” from CBS Par TV, was the first new fall show to premiere. After a blazing start with a two-hour debut Sept. 2 that was seen by 4.9 million viewers and posted the highest-rated series premiere in the CW’s two-year history in women 18-34, adults 18-34 and adults 18-49, the “Beverly Hills, 90210″ spinoff dropped precipitously in its second airing but recovered nicely last week to average 3.3 million viewers.
Read the rest here.

The fact that CW did this without even seeing what 90210 will do up against competition makes me think they were going to do this no matter what.
How did it “recover nicely” when it was still so far below its premiere ratings?
I’ll never understand TV PR talk as long as I live.