It's a 2200-word document written by someone whose native language isn't English, and there is a single verb that doesn't agree with its subject. Since that's the only actual complaint you appear to have about the document, I'll assume you agreed with the very well reasoned, well researched viewpoints therein. Overall worth reading, I'd say.
Opera Software is located in Norway. Let's see how much "respect" you have for the language if you have to write in Norwegian.
I bet their English is better than yours. You didn't even start the first word using a capital 'S', so you have a mistake already when writing a single sentence.
Why is it when people say things like "lack of respect for [insert language here]", it's always to defend their own lack of respectful behavior towards, you know, actual human beings?
When complaining about somebody else's non-native English, consider using of capital letters if you don't want to be yet another instance of http://en.wikipedia.org/wiki/Muphry%27s_Law .
I would think if I was going to submit something to W3C I'd consider asking someone to proofread it.