On the one hand: Nokia is one of the most open companies regarding their devices.. we actually know about M6 and have *some* information about how it's going to be built.. etc.
Apple wouldn't tell anybody anything till it was time for release in my understanding.
OTOH: this *little* bit of openness from Nokia generates tons of questions.. and it's then that Nokia just shuts up and says nothing. That gets annoying.
However, regarding your direct quote, this is the link used by Guber and others about the whole provisioning mess: Check Your argument is double-edged... right there is a page specifically about exchange and checking work email - and specifically - the N900 is not there!.
So I, personally, would demand a link to an official Nokia document that explains that provision is supported.. since there *is* a page about Mail For Exchange on Nokia.com... and it doesn't list the N900 as supported.