All the previous trailers/TV spots have added up to about 5 1/2 minutes of screen-time. The added footage in this one is MAYBE 20 seconds (considering how fast it's cut together) so...
6 minutes of this 140+ minute movie have been used in the marketing beforehand.
So long as the people who don't visit messageboards to lap up every drop of marketing (i.e. not us) are watching one or two of these spots/trailers, it's a successful strategy, it seems. Anticipation is pretty high.
Well it doesn't really work that way in terms of information processing. If they show an unedited 6 minute scene from early in the film, then yes, it would only be about 5% of the movie. The problem with trailers is that they comprise of many, many short bits of larger scenes, and as such, audiences are exposed to a much larger percentage of what to expect from the material in the movie. You can have a 5 minute scene in the film summarized or condensed into 10-20 seconds in a trailer, and it already exposes viewers to that entire scene. It doesn't matter if the other 4 minute 40 seconds of the scene are not in the trailer.
I'll estimate that with 6 minutes circulated around all the trailers, we've probably "seen" at least 40% of the movie in one form or another. That's not to say the movie is ruined though, because a lot of it could be out of context, and its possible they saved all the good stuff and the punchlines for the film itself. But saying that it's only 5% of the movie is not that accurate.