Why are Hollywood trailers such rubbish?

There's a great talent in Hollwood for making a $200 million movie look cheap, tacky and ugly, says David Gritten in an interesting article in the Daily Telegraph today.

You can read it by following this link:
http://www.telegraph.co.uk/culture/film/film-news/8652956/Why-are-Hollywood-trailers-so-rubbish.html