For musicals-- sure, there has been a lot of bad casting of people who are not trained singers. I'm going to voice my distaste for a recent musical that just came out of which I think the casting was... lacking.
However, I have faith in Rosario. Sure, there will be people who don't like her in the role, just there might even be people who won't like Idina as Maureen, or Wilson as Angel. (YES, it's possible people!) There are a lot of people in this world who have very strong opinions about things. Angus, you are entitled to yours. But I do recommend that you back off the shots at Ro until you see her in the big screen. Give her another chance. Do NOT base your entire view of whether she was miscast off of one crappy audio of about 20 seconds of one song. And in November if you still don't like her, then maybe we'll all respect your opinion. But for now? It just doesn't seem valid, with all due respect.
"You know, a little orphan girl once told me that the sun would come out tomorrow. Her adopted father was a powerful billionaire, so I supressed the urge to laugh in her face. But now, by gum, I think she might have been on to something!"
--Reefer Madness