Chevy S-10 4x4 6cyl '97 w/extended cab.
It used to:
1) Get to a lower temp
2) Cool off the cabin quicker

I don't know much about cars. What I'm trying to find out is, with
compressors, evaporators and condensers, what are the most plausible reasons
for the AC to take much longer than it used to  to get to it's coldest
temperature (assuming all other outside variable (outside temp, etc.) are
the same)?

It used to start blowing real cold air within just a couple of minutes -
even on really hot days. Now it seems to take 20 minutes on real hot days.

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