George Baldock believes United's impressive start to the Championship campaign will be getting noted elsewhere.
Speaking ahead of the midweek clash against fellow high-flyers Wolves at Bramall Lane, the defender says the squad aren't surprised by the positive beginnings.
He commented: "People will have to start taking notice of us, because it isn't just two or three games, we're nine games in now and the tenth game in against a side many are tipping for promotion.
"That will be a big test for us, but people are now taking us seriously and we've got the belief and confidence to keep going."
And Baldock thinks United have a squad capable of continuing to progress in the second tier, adding: "We've recruited really well and whoever comes in doesn't weaken the side at all, that's credit to the manager and staff.
"When we do team shape and scenarios on the training pitch everyone is involved regardless of who is playing or whether or not you're in the squad.
"We've exceeded a few expectations, but now we're playing really good stuff and even if we don't get the result we want then we're still playing exceptionally well.
"But if we were to get carried away I'm sure the Gaffer would come down on us like a tonne of bricks."