I've never had a misreported resolution and you are suggesting that both Win and Ubuntu are getting it wrong. I find it easier to believe that Intel is misreporting or, more likely, hasn't updated their info. In any case, okay but I have a few other things to get to first.
BTW I'm not an Ubuntu fan boy, quite the contrary (esp. with Narwhal), but I've got work to get done, so 'any port in a storm'.