After the Tasks to Approve, Complete, Acknowledge etc. is sent to the assigned user and they click on the link (ex. "NamedForm.xml") the form attempts to open but renders very slow. The form will eventually open, but it takes several minutes before doing so. Any reccomendations as to how I can speed this up?
Look at the article Improving the Performance of InfoPath 2007 Forms to see if there are any hints for you. Even though the title says 2007 it's still the recommended reading by Microsoft for 2010.