I am having a similar problem. XP SP3 with Adobe Reader X printing to a PCL6 printer - networked Kyocera MultiFunction device - I installed Sumatra PDF reader on the PC as a test and printed the same PDF in seconds versus the 15 to 20 minutes of Adobe Reader X. Spool size with the Adobe print job climbs to over 50 MB! for a file that is under 3MB on disk.
I am having a similar problem also. I have Windows XP machine and we print a lot of PDF file through a print server and it takes a long tim to print depending on the size a 60 page document can take up to 20 min. I have loaded 10.1 reader to see if this would help and it hasn't. I been trying to figure out how to make the printing go faster but i am not having much luck. i have tried printing as image it didn't print faster. I trie Post script drivers it didn't print faster. It has to do so much rendering and then makes a hugh file to the print server. Example the file is 2 meg and it loads to 40 meg on the print server. I which someone could provide some guidance.