TOR is definitely slower than an unprotected computer!
I went to one of those IP finder sites and was HORRIFIED when I entered my 'real' IP addy... It freaked me the FUCK out. I was like, oh shit, they could be out in the hallway right now.. AAAAAH!!! Like, geographic coordinates freaked out.
I literally went out and bought a laptop with cash and it has never been anywhere NEAR an IP with ANY connection to me. When I'm not on that, I use TOR.