I suppose that Gears folder could have been left there because the application was running when the software was uninstalled — I’m really not sure.
An easy way to see if deleting it would have any affect is to temporarily move it somewhere else (e.g., from the terminal:
mv Google Gears for Safari/ /Users/Me/). Reboot the machine and see if anything acts funky. At least that’s the trick I usually use. 😉
Yes, this blog entry certainly has helped a lot of people. I never would have guessed it when I originally wrote it! 🙂