I'm sure QS will hop in here whenever s/he's around and give a good explanation about why this thread is silly, but I'll go ahead and put my two-cents in as well.
Depending on what you mean by "safe", yes it is entirely safe because to my knowledge no deal that was escrow'd by QS or his alts was botched and no 3rd party was disappointed with the service.

Just because escrows have alts doesn't mean they're not trustworthy.