Well unfortunately, the ratings are not that good for season one. At least that's what is stated on Toonzone. I will post the rating. But don't ask me about it, because I don't what it means. But from the reaction I got from Toonzone indicates that it's not doing so well. However, season three isn't out of the question yet because we still have season two, and, even though DXD doesn't renew TSSM, Sony can look for another network.
Anyway, here are the ratings:
DISNEY XD 0.5/3 Avg. (7a-1p) Suite Life of Zack & Cody 0.3/3; Phineas and Ferb 0.6/5; Phineas and Ferb 1.1/7; Jimmy two Shoes 0.7/3; Kid vs. Kat 0.6/2; Phineas and Ferb 0.7/3; Monster Buster Club 0.5/2; Yin Yang Yo 0.4/2; Spectacular Spider-Man 0.4/2; Spectacular Spider-Man 0.3/2; Spectacular Spider-Man 0.5/3; Aaron Stone 0.4/2