This is a pretty interesting way to look at a script by the numbers: http://blog.celtx.com/script-insights-7-famous-screenplays-numbers/
The action vs. dialogue percentage is too subjective, per each writer's style, to really mean much in my opinion.
But the dialogue allotments are great. Like seeing that Mr. White holds the largest portion of any character's dialogue in Reservoir Dogs - at 18.8%. Or that the majority of scenes in Bladerunner are interiors.
This might be the first time I've ever enjoyed looking at pie charts!