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Interview with Mark Day, Editor
http://www.theworstseats.co.uk/2010/04/08/interview-mark-day-film-editor/
He mentions the DH films have an average of 2hr 20 mins runtime.
He mentions the DH films have an average of 2hr 20 mins runtime.

Comments
Lord Stafford.
"I cant give you the exact figure of the amount of film I discard but when you think that two units have been shooting Harry Potter (the final two films) almost continuously for a year and each film is about 2hrs 20 mins on average then it doesnt take a genius to work out that the ratio is pretty high!"
I interpret that to mean that the final two Harry Potter films (DH I and II) are shot by two units non-stop for a year, with both films being about 2hrs 20 mins.
And Richard yes i knew You BASTERD! lol.
Lord Stafford.
Lord Stafford.
Lord Stafford.
Lord Stafford.
Lord Stafford.