It is well known in the animation business that voice actors only get scripts very close to the actual recording sessions, so the fact that she has scripts effectively confirms that the Book 3 voice work has begun, even if none of the other VA's on twitter would confirm it. Here are some of the tweets
"I might have been hanging out with
@janetvarney and@DavidFaustino ...not saying what... just saying might! Oh, what might!" - PJ Byrne
"@PJ_Byrne@DavidFaustino Could it be that we were reKORRding?" - Janet Varney“
@janetvarney:@PJ_Byrne@DavidFaustino Could it be that we were reKORRding?”I Korradn't tell you?" - PJ Byrne“
@Lynner2010_O:@DavidFaustinoKORRRRAAAAAA!!!!!!!!!! I think I was told you guys would start recording about now.?” "Mmmaybe..maybe not ;)"" - David Faustino"Recording a cartoon this morn. (No I can't say which, ahem, Korra fans. I'm on 4 cartoons right now, so could be... Or could be not..) hehe" - David Faustino
Which at least for me begs the question, Will Nick not let them confirm they are recording? or are they just having some fun with the fandom?. Given nick's strictness with regards to voice actors releasing any info it is probably a mix of the two.
If they are just messing with the fandom it was a pretty poor time to tease information with the SEVERE lack of info coming out related to Korra, as shown by NO INFO WHATSOEVER from NYCC. It is getting a bit frustrating that there is no info. Where are those Korra Nation updates we were promised months ago ? It is as if Nick don't want people to be excited for the show or even know about it.
Thoughts on this "news" if you can even call it that and the lack of info overall.