'Sabrina Fair' (the play)

Has anyone ever seen the Samuel Taylor play performed? The fact that Margaret Sullivan played the title role on Broadway immediately tells me that Billy Wilder did some extensive changes. Ms. Sullivan was in her early 40's. Did she actually play Sabrina as someone in her early 20s? Joseph Cotten played Linus and someone named Scott McKay played David. Also, the stage Sabrina had spent two years in Paris as the private secretary of some diplomat, not attending cooking school. She also returns to the U.S. with a French suitor (fiance?) tagging along. Both situations signal to me that the stage Sabrina was older and much more mature than the screen Sabrina.
The stage play closed in May 1954 and the film opened in October, so one thinks quite a few people saw both. WOnder what they thought about the movie's changes?
"May I bone your kipper, Mademoiselle?"