As someone who has seen several of the later casts of Rent at the original production (up to the final tour), I feel like the show still had the raw energy even if the actors didn't live in that world or have that experience (let's face it, AIDS and NY were very different even 2 or 3 years ago compared to the 90's).
I thought Brantley's view was pretty fair, but I think the actors got the short end of the stick on this one. I saw some great performances from several actors in addition to Annaleigh.. if it felt like they didn't feel at home on the set and costumes, then maybe that's where the problem lies...
I know it sounds simple and like I'm a purist, but if the cast isn't given the appropriate tools to work with then it can affect the overall production.
So, that was the Drowsy Chaperone. Oh, I love it so much. I know it's not a perfect show...but it does what a musical is supposed to do. It takes you to another world, and it gives you a little tune to carry with you in your head for when you're feeling blue. Ya know?