I can play and sight read MUSIC better.
Who doesn't? It takes about five minutes to learn. I learned it out of the back page of Guitar for the Practicing Musician, years ago.
If I know the tune I can sight read tab pretty quickly. If I only have notation it is a very SLOW process.
Sight read? No. But it'd be pretty hard not to figure out the notes from tab.
Can I sight read & play a piece cold - no (at least nothing complex), but I would feel sorry for someone who couldn't decipher tab.