This is great, thanks!
msi:action and msi:install went from an average of 99 and 90 seconds down to 48 and 39 seconds and they are not timing out anymore. The remaining troublesome tests are now ddraw:ddraw{2,4,7}, shell32:shlexec, and winspool.drv:info.
Just summarizing: we have a hoped for fix for the XP revert time issue; if that holds, then we have those troublesome tests, and fixing failures to go. Is that about the size of it?
Cheers,
Jeremy