I think it's a fair complaint, it is fairly dense and as something that's supposed to encourage adoption you might want to have a quick high-level summary.
On a slightly different note(and no idea if this goes against HN guidelines) but you've got a fairly argumentative tone. If you're really interested in seeing the language flourish I'd try not being as combative.
Community is just as important as how well a language is designed and based on the tone of a lot of the sub-threads here I'm not really inclined to look into Ceylon any further.
Alas, to his defense, it's slightly unnerving to read malinformed, biased critics all-thread long.
I would really advise him to try and ignore most of them if he wants to keep his sanity though. (serious, been there, done that.)
Especially since I think that the language looks quite promising.
Sometimes, it's ok to correct things even if a little harshly though. People will always find a dumb argument anyway.