This is true about Tina--someone did a chart, I will link it if I find it again later, and Tina has sung more in terms of solos than Quinn has.

Which... makes sense, with Quinn. That she wouldn't feel like singing all the time because she's cracking up inside. And singing would involve revealing personal feelings/the truth. WHICH IS BAD.

OH BLAINE, OH BB. I really want to see this yearbook! :D