In the blog entry, Mark writes about "... a willingness to chase down the problems that stand between here and there." From my experience, problems are not chased down but rather the Ostrich algorithm http://en.wikipedia.org/wiki/Ostrich_algorithm is applied.
While running karmic (9.10), I noticed a bug with the network-manager pertaining static IP addresses and wireless connectivity, which made it unable to connect to certain configured wireless access points. Lets take a look at the network-manager released with 9.10: http://packages.ubuntu.com/karmic/net/network-manager , it is (0.8~a~git.20091013t193206.679d548-0ubuntu1).
Now lets look at the updates for karmic at http://packages.ubuntu.com/karmic-updates/net/ , there is not a single one (!) for network-manager. For the whole six months until the next release of 10.04, not a single update for it has been provided! They just took the git snapshot and left it in 9.10.
Just compare it to Fedora 12 and their updates on http://koji.fedoraproject.org/koji/buildinfo?buildID=172857 , karmic (9.10) was released at October 29th, and one can see the fixes and updates through Oct, Nov, Dec, Jan for F12.
I do not care about the marketing strategies and public image of Linux distributions, but rather about exactly what Mark said, about " ... a willingness to chase down the problems that stand between here and there."
For me, Ubuntu did not deliver that.