Pure Arrogance.....
I guarantee that my belgium ale would be the equal of any AG. And its a mere kit and bits brew.
Belgians are potentially the worst beers to use as a yardstick on this issue. They are made with a high proportion of sugar afterall, so the extract vs AG bit is masked by that. A friend of mine once told me that if you infect a strong ale, just call it a belgian!
If you can brew an extract Bohemian Pilsner that is better than the AG equivalent, I'll eat my hat.
The most important thing to remember in this whole discussion is that to make some sort of objective comparison between AG and extract you have to rule out all other factors. So that's fermentation temp, sanitation, yeast type, and just the idiosyncrasies of different brewers and their methods. So its not really possible to say "I tasted an AG beer that was much worse than my kit beers - therefore I conclude that AG is not better" as the AG beer may have been brewed badly or infected or whatever. That is not an objective comparison.
I am also looking forward to the Xmas in July case swap - its been years since I tried a kit beer so it will be interesting to get a refresher on what they are like in a comparative sense.
btw, MAH made an excellent point. These arguments always end badly (hence my tentative initial post) and really solve nothing so I might just pull myself out of this one now...