I found the answer today on the Adobe message boards. Apparently Acrobat
6.0
is very slow across the board. The fix for this is to create a Postscript
file of the PowerPoint presentation then create a PDF using Distiller. The
results are amazing. I was here late working with a 49 page document that
took 4 hours to create a PDF versus the postscript file only taking 2
minutes this morning.
Hopefully Adobe will optimize later versions.
I haven't worked with the Mac version, but if it's anything like the Win
version, a lot hangs on your PDFMaker settings. That's the set of macros
that converts links in your PPT to Acrobat links and so forth. The more of
that type of work you have it do, the longer it'll take; tagging in
particular seems to add a lot of time.
Basically, the PDFMaker macros do a bunch of stuff within PPT then print to
PS and invoke Distiller behind the scenes anyhow. It's the "bunch of stuff"
that seems to be the time-eater.
If you need to convert hyperlinks, try turning off the features you don't
need and making the PDF again from within PPT. Otherwise, just do what
you've already discovered.