I don't think his claim was predicated on the success of Android in China, but rather upon the general success of OEMs shipping Android phones. It has users and an ecosystem which WP7, interesting though it is, can't claim.
Many people would have lept at a Nokia smartphone running Android, given the consumer goodwill they've built up over the years. Few seem willing to do so for Nokias running WP7. Android was a proven platform with wide adoption when they announced their support for WP7; their decision to hitch their wagon to MS can only be seen as a grave mistake.
Maybe things will turn around, but it doesn't look likely at this point.
By going with android Nokia would have sold phones and definitely would have seen their overall unit sales increase. As we've seen of late, google itself makes almost nothing per mobile phone sold. That means any revenue/profit made off selling android units are split between the handset manufacturer and the carrier.
Instead of having a good chunk of that massive growth to 70%, they chose WP7 which lost them marketshare, and still have to split any money made with the carrier AND MS.
I don't see how this is currently a win for them atall.
Just because Andriod has gained a huge market share in China does not imply Nokia would have sold a lot of phones if they have gone with Andriod.