The progress you are making doesn't surprise me. The models are really fun to paint, and with big models, you can map your progress much more rapidly than with regiments of IG Troopers or Clanrats.
Keep up the good work! I am looking forward to seeing them on the battlefield - SOON!
If you are planning on making Sooiepalooza with them, you won't regret it. Everyone has fun playing against the Ogres, as well as the Ogre player himself!