Air Conditioner... is it cold?

Ok... I've heard people talk about not having cold A/Cs because Scion had put too little refridgerant into the car. Supposedly this only happened to the first batch or two of the tCs.

I was unable to check whether the A/C in the tC was cold enough or not cause we've had a pretty mild summer until yesterday. It was blazing hot (for me... that would start at the low 80s. ok... i'm a heat weakling )! But anyways... I rolled down all the windows and opened the sun roof to let all the hot air out of the car... then I turned on the A/C and let that run for a while when I was driving. After a few minutes, I rolled up the windows and closed the sun roof and let the A/C blast. I let that go for a while and well it was still very hot in the car... the A/C didn't really feel cold. I don't know if its just me or if it is supposed to be like that. Have you guys experienced the same thing??? How long did it take for your cars to cool off??