Yeah, it's been confirmed on this site. A less concrete confirmation was a story of when Trish was stretching back stage, Big Show came over and tickled her foot which caused her to almost hit the roof. A more trust worthy confirmation was when she was asked on her fansite and said yes.
Someone should make a separate thread of all the confirmed ticklish women of wrestling similar to that of the ticklish pornstars. Each subgroup of celebrity should have their own list of confirmation threads, singers, actresses, even YouTube celebrities lol.