The Canaries have impressed following consecutive promotions with the team well placed on 28 points from 21 top-flight games.
Lambert's men won 2-1 at West Brom last time out, moving the Norfolk side a healthy-looking 11 points clear of the bottom three.
However, Sunderland have been resurgent under new boss Martin O'Neill while strugglers QPR now have Mark Hughes at the helm.
Lambert knows a change of manager can bring about improved results and he is not writing off the pair climbing the table.
"You look at QPR. They have changed it with Neil (Warnock) to try and give them a fresh push as well so they could come racing up," Lambert told the pink'un. "Football is a dangerous game and if you don't get the results then things like that can happen.
"He had done great there and the owners decide what they want to do, but that is football.
"There are a load of teams doing great. Look at Sunderland under the gaffer, which I knew would happen. There is nobody really detached from anything.
"I said at the time (when he took over) it's not great for everybody else. I knew what he would do. I had played under him for five years and in all that time as a manager I knew so it was no surprise to me one bit."
Blackpool suffered an alarming dip in form in the second half of last season and were eventually relegated, something Lambert knows can happen to any team.
"That could happen to anybody but we are a different club," he continued. "We're like everybody else. We need players to keep their form and hope we don't get injuries and suspensions.
"The lads are playing with a lot of confidence at the minute. I'm delighted with what they have done for me. I don't think anybody visualised this, but we are halfway through and there is a long, long way to go."