The AQUA is a Much better HYBRID than Fit, you can say a TRUE Hybrid!
I have learned about IMA & TOYOTA's HYBRID in an article, one main Line i saw was:
"toyota's HYBRID System is close to an electric car but the IMA is a kind of an Advanced HYBRID Gasoline"
Also im now a little hazy, but a little i remember was that the Electric motor of toyota is more advanced or bigger than HONDA's.
One thing is for sure that TOYOTA's Hybrid is Advanced than IMA, even the dealers say that!
But yes, AQUA is Currently new to the Market, the Dealers are demanding much for a 1500cc HYBRID, may be that's the factor that people aren't buying it much.