Probably not haha.  She just hates Stevie's voice, so what can you do?  Won't stop me. 
One thing I can say for Glee - sometimes they improve songs.  Usually they make them worse, or just do an okay impression, but sometimes they get a really great interpretation.  "Songbird" was that song this time - frankly, I think it was better than the original.  
Kristin Chenoweth sang "Dreams" and it was actually pretty awful; her voice is not suited at all to this music - she's operatic, and Stevie sounds like she just got done chain-smoking right before she sings.  Which is why it's great haha.
I could now dive into the basic reasons why I think Glee is the coolest show ever - not because they are all fantastic (or in some cases, even mediocre) singers, but because they're teaching a younger generation about all of this fantastic music that they'd never IN A MILLION YEARS listen to on their own - but I won't haha.  I'll just say that Santana did a great job this week!  Oh and I wish they'd played one of my favorite Fleetwood Mac songs from Rumours, The Chain, but hey you can't get everything.
 
 
