Their entire product line is available in hybrids with a low speed EV mode. Most of their competitors don't seem to be offering hybrids of larger vehicles like SUVs. But if you need a third row seat car that gets 50% better gas mileage than anything else in it's class... Toyota can sell you one.

I suspect the only reason they aren't selling full EVs is that the number of people willing to shell out for them is still so small.