I find that I use more sentence fragments in screenplays than I do in stage plays. It's the bloody font and format and the way sentences break in screenplays. I'm more inclined to chop down a sentence in a screenplay to save myself an extra line or two because there's a higher premium on pages.
The consequence being, the dialogue in my screenplays feels a little different than the dialogue in my plays. And I'm always trying to strike some balance there. Dialogue just has more room to breath and find its own rhythm in a stage play.