If the part is typically played by a thin actress and a fat one is better, give here the part. Unfortunately that doesn't happen very often, I understand that. If you read my post again, you'll see that that was what I was saying: that "unfortunately, [the fat actress getting the role over the thin actress] doesn't happen very often". You will also read that I agree that the best actress should get the role; however, when a thin actress playing Tracy isn't completely stellar (as Toronto Tracy isn't - the production is spectacular, but Tracy is merely satisfactory), one can't help wondering if they could have chosen a plumper, more talented Tracy who is actually believable as a fat high school kid.
Of course on Broadway, casting directors are only interested in those who are best for the role: the performer has to go on 8 times/week in front of a thousand people, she needs to have the talent and stamina to do that. But when hundreds of performers come to audition and so many of them are amazing, other factors begin to sway the vote: how old the performer is, how tall/short, and yes, how fat/skinny. It's an awful system, and I wish that for Hairspray, instead of the usual "Oh, she's good, but I wish she were skinnier," it should be, "Oh, she's good, but I wish she were fatter."
BlueWizard's blog: The Rambling Corner
HEDWIG: "The road is my home. In reflecting upon the people whom I have come upon in my travels, I cannot help but think of the people who have come upon me."