Back when i had an old macbook pro, the time machine restores would make the system extremely slow...
I've never needed to use this function to save from a bad install, i just reinstall the OS if needed (that IS if i can boot into anything and use carboncopycloner).
Has this been measured? Proven? Shown that certian system files are not being updated in the proper manner? or whatever the case may be for Time Machine Restore Muck?
Surely someone has charts n graphs and all that nice multimedia fx to show this is a quantifiable manner! :P
on another noter...man i wish my dell mini had audio...netbookinstaller, and the kext b7 app don working.