We have recently completed a migration of our site from SharePoint 2003 to MOSS 2007. In this site, we have a lot of stored InfoPath forms, not web-based ones. In SPS 2003, these forms probably take at the most 1 minute to submit the changes to the Forms Library but when using the migrated version in 2007, the
InfoPath 2003 form's data connections just time out. There are about 16,000++ forms ...