Are screen dimensions same thing for all resolutions in Corona way?

Hi,

basic iPhone 3GS resolution is 320x480 but when I put an object in 10, 10 in iPhone 4G mode I still see that object in the “correct” place, as it would be plced in 30, 30.

I also put an object in exactly 470 by setting it’s y to 470, so it should be on bottom of the screen in 3GS but almost on middle of the screen on Retina displays but in all devices in simulator the object is in bottom of the screen.

So does Corona do the transition/transformation or I’m mistaken?

I’ve read about this on the blog and I know some basic stuff regarding this and using contentWidth and contentHeight but I was curious about this for a long time that I thought asking it won’t hurt.

Thanks.