Camera VS large printing size?

In article <1133631984.125987.148830 RemoveThis @g49g2000cwa.googlegroups.com>,
winhag <winhag RemoveThis @yahoo.com> wrote:

> Yes I agree that there is an image dependance factor. But generally, a
> 20D should do fairly well at 16x20 with proper upsampling sharpening. I
> have even printed some 20"x30" from a 20D (upsampled/sharpened) and
> they look quite good. At that size you may begin to see a little of an
> 'artificial' look but overall a properly produced print can be sharp
> and stunning at that size if executed correctly (clearly better than
> 35mm film).

I've got some outstanding 16x20s from my 10D. The 20D should go to
20x24 easily.