I always laugh when my commonwealth friends get so damn pissed about the differences in spelling and such. I personally couldn't care less, if I'm reading and I see a couple extra "u's" where they shouldn't be, I'm still going to know what the words are. The differences are so few and far between over the broad scope of the language that I can hardly see what the fuss is about.
If anything, I'd follow up with what Napoleon started into. I think that you'll find much more of an inferiority complex re:English with the English. American english is spoken natively by 320 million people, but it goes way beyond that, the domination of American culture all over the world is slowly going to bring everyone towards speaking like we do, and I think that bothers some brits. What percentage of films in US theaters are british vs the percentage of US films in UK theaters? I sometimes find my roommate from New Zealand to be completely incomprehensible due to his constat use of foreign (to me) slang, but he has only once ever misunderstood a slang term or phrase that I have used.
I do love how the blogger used two words I've heard, read, and used multiple times in the US as examples of why he likes "British English".