glad someone noticed...as it stands, the price difference between the 2 and 3 is insignificant...now if Mazda was to price the 2 @11.9K and the sedan at the same price, I believe people would buy them.
I can only speak from my own experiences, but when we bought the Corolla, we actually went into the dealership with the intention of buying the Yaris. We wanted a cheap, cheap car. That was it.
When priced out with ABS (literally the only requirement), the Yaris was <$1,000 cheaper than the Corolla, but for that $1,000, you got a smaller car, with less power, that was no better on fuel, did not have cruise control, and did not have a telescoping steering wheel.
For us, it was a no-brainer. For $3,000 saved, it may have been something to consider. I'd wager the difference should be more akin to $4,000 saved to really have an appeal.
...but for <$1k, why would anyone choose a Yaris over a Corolla? Especially nowadays with the Corolla having nice features like LED lowbeams, etc.