And the former Scotland player believes his team deserve more credit for taking 61 points out of a possible 63 so far in the third tier.
McCulloch, whose team host Arbroath on Saturday, said: "Having played in the SPL myself before, I don't think there's that much of a gap between the top flight and League One.
"It's a very thin line between the teams in the division we are currently in and the Premiership and I don't mean that disrespectfully to anyone.
"You look at Motherwell and they went out to Albion Rovers in the Scottish Cup this season, who weren't even at home.
"There was another upset at Celtic when Morton beat them at home and that just shows if you drop one per cent or hold off half a yard, you'll get punished.
"I think a lot of credit has to go to all our boys and the management for handling that. We've been really good this season, albeit we've not played every game the way we've wanted to.
"That happens every season. I just think with the amount of games we've won, we've done well and we've set a standard in the dressing room."