Short answer: NO! (And he is referred to on these pages as The Mighty Jeremy Piven).
Longer answer: The NY Times has a theater review of David Mamet's Speed-the-Plow, currently running on Broadway. In the article, the author notes how Piven recently left the show early, breaking his contract, and how the producers have filed a grievance. In the meantime, the show has run with two replacements: Norbert Butz and William H. Macy (a legend in his own right!).
I found this article interesting because of how the author perceived the play differently, based on who was cast in the central role. In particular, he cites David Mamet's own belief that the actor has virtuallt no role in the creation of a play's character: his/her job is to read the lines the playwright has written. And while each of the three actors who have played Bobby Gould have recited the lines virtually verbatim, they still present in significantly different ways, which impacts the viewer differently on each viewing.
I find this to be immensely interesting, particularly because the profession of actor is like a Rubik's Cube to me - a fascinating puzzle I will never come close to solving. On the one hand, learning lines, understanding motivation, etc. appear to me to fairly straightforward. However, I also apreciate that the best actors bring something else, something difficult to quantify or define, that delivers much more than the lines on the paper. Maybe because I see therapy in a similar light (good therapy: can't technically define it, but I know it when I see it!) that I have such an interest in this idea. Even more interesting from my perspective is that therapists will adopt various roles at various times, all in the service of "moving a client from A to B." There is an awareness of these shifts and motivations as they happen, though a clinician may be hard pressed to describe the mechanisms to the average lay person. My guess is that acting has some of the same subtle initiatives to bring a certain perspective to a character.
Then again, maybe I don't know what the heck I'm talking about. In any event, I do find it interesting to compare various portrayals of the same character in peformace art, especially when the source material is generally consistent. This sounds like a temendous experience in terms of seeing three different performances of a great writer's main character, all live, and all fairly close in terms of time. Interesting stuff!