Williamson is averaging 78.3 in tests since the start of 2014. Ross Taylor, his double century hitting partner in their 265-run stand for the third wicket in Perth, struck three centuries in as many tests against the West Indies in the 2013-14 season.
Williamson, who is a good innings away from taking his average to 50, the mark regarded as a benchmark distinguishing the very good from the outstanding, can emulate it at Adelaide but he's unlikely to lose any sleep over it, according to Hesson.
"He's a really unflustered sort of character. He never gets too far ahead of himself so you'd never know whether he got a hundred in the last game or missed out.
"He's playing well, he's in a good pace."
Hesson is happy with the progress of the other batsmen in the test lineup.
Opener Tom Latham ''has got a number of starts and no doubt he'll want to kick on.
"Martin Guptill got a really good hundred the other day (against a West Australian XI in Perth) and played the way he and I want him to play.
"So I think hopefully he could be ready for something big."
Captain Brendon McCullum went on a slogathon at Perth, hitting 49 in 28 balls before being stumped on the charge. Hesson defended the innings, which was his only practical pink ball rehearsal in a game situation before the test starts.
"Everyone deals with warm-up games a little bit differently don't they. You try and get different things out of them.
"Brendon was obviously keen to do a bit of work on his short ball and he certainly got plenty of opportunities to do that."
