For me it depends on the latest games I've purchased. I'd bet this is the same for any multi-console owner. Consider this survey took place after NSMBWii launched.
Once I bought my PS3 in February, I played it exclusively until 3 weeks ago after I had finished Assassin's Creed and BatmanAA. Now, I've been playing Wii exclusively until I finish NSMBWii and SMG2. Then I'll probably hope on Ps3 to play AC2 until MetroidOM launches.
However, in my kids only play Wii for many more hours a week than I play any games. So, Wii is definitely used more by my household at any given time.
EDIT: sorry, forgot to mention how bad the OP failed. You really need more argument than a title buddy. lah-oo-sa-her.