Leeds United are one of England's in-form teams at the moment.
Leeds are the only side in the Football League yet to lose a game in all competitions this season, with the Whites winning seven and drawing two of their nine games so far.
Thomas Christiansen's side travel to Millwall this afternoon with the intention of preserving their unbeaten run and their spot at the summit of the Championship.
United have scored 23 goals in all competitions, conceding just four - and haven't shipped a goal in the league since the opening day of the season, six weeks ago.
Indeed, the West Yorkshire outfit certainly look like the real deal this season and, given the size of the club, former Wolves boss Jackett believes that Leeds could only grow to be more unstoppable as a result of the snowball effect.
He told BBC Radio Leeds: "It's a great club, good situation with so many playing coming in. They've sold high in Chris Wood but spent a lot of money as well. It looks like they've made good decisions in terms of their recruitment.
"We all know that at a club like Leeds, once it gets going it can really snowball and I think that's the case at the moment.
"Six consecutive clean sheets is some record and it's going to be tough to stop them this year."
As Jackett touched on, Leeds sold Chris Wood - who scored 30 goals last season - before the transfer window shut, and their stunning form is arguably more impressive by the fact that losing such a big player hasn't had a negative effect on them yet.
Of course, it's early days and there'll be plenty of twists and turns, but so far Leeds are better without Wood than they were with him last term under Garry Monk, and fans will be over the moon.