The 23-year-old England international played a part in both his side's goals against West Ham, and although he was later involved in an unseemly spat with Hammers striker Enner Valencia, it was a day to remember.
Shelvey told nufcTV: "It's an easy place to come and play football, to be honest with you. The fans are behind you, there are some tremendous players in that dressing room.
"It normally takes a little bit of time for players to settle, but I felt right at home.
"The players were reading my passes very well and people were getting into position, so it was just easy. I thought it would be a lot harder than it has been this week, but it has been perfect.
"It was a massive win. It's been a great week for the club - it was a great point against Manchester United and we have followed it up with a massive win against West Ham.
"It was a perfect performance, I think, in the first half. We started really well, pressed the ball and they rarely played out from the back. We showed real intent and got our two early goals."
Shelvey said modestly: "It's quite an easy pass to make. Daryl makes those forward runs all the time - he's a very advanced full-back - and if he keeps making those runs, I'll always try to find him."
Shelvey and Valencia came together off the ball seven minutes before the break with the striker going to ground, but McClaren later dismissed the clash as a bout of "handbags" and is expecting to hear no more about it.