Is AF of K5 significantly superior over K20D?

As the price of the oryginal K5 (not II) became very attractive in my country, I consider the upgrade from my current K20D, which I like and which performs very well. I know about handling, IQ, high ISO performance, but I'd like to ask you about the AF. K20D is OK, I can't complain, but I'd like to know, how it looks in K5, comparing to K20D. According to the tests it's better, but I'd like to ask users of both, what is the difference in terms of speed and accurace, in good and low light.

Andrzej

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