kalinl: We had some wierd issues with 7.01 where the PDF didn't automatically open when running a UBE and would not open when clicking view pdf so we uninstalled and re-installed 6.
There is an INI fix you can add depending on your Tools Release, it specifically addresses the delay in printing with Acroread. If you aren't running >=8.9 - I don't know that it is something they've fixed.
Take a look at 8.94_O1 release notes. I haven't looked at Xe/8.0 Service Packs in quite some time. You need the SAR before the INI change will do anything....