I have what seems an issue with the EPM Add-in and XenDesktop 7.5, I am running a Windows 7 64 Bit OS in XenDesktop. I have Office 2010 SP2 installed. I also have EPM 10.0 SP 18 installed.
When I open MS Excel it loads quick. However if I open Excel with the EPM add-in it takes a bout 25 seconds. Same thing occurs when I close out of Excel. It takes around 12 seconds to close.
I have also built another XenDesktop box and installed only Office 2010 SP 2 with EPM 10.0 SP 18 and the same thing occurs. The only other thing I could rule out is the VM template.
When I do this within XenApp it probably takes about 5 seconds or so, but is more than doable.