Most likely. What I don't remember is whether or not Dumbledore ever gave it back to Fred and George; he presumably did if Quirrel stole it, since I doubt he would have had an easy time getting it from Dumbledore unnoticed. And if we didn't get confirmation that Dumbledore returned it, I suppose this might fuel "Dumbledore did it" theories. Most of my probability mass goes to Quirrel, though.