The Bhoys are currently eight points clear of title rivals Rangers following the 3-0 win at Parkhead on Sunday and Wilson puts it down to the mental application the players in green and white now have.
"I don't think we had that mental toughness last season or earlier this season when we lost to Rangers at home," Wilson said.
"It's something Rangers have had and now you've got to say we've got it in spades.
"We have a team packed with winners, the atmosphere is terrific and we now go into these games confident we'll win.
"That shines through in the way we play."