Harper earlier this week described Joe Kinnear's appointment as an April Fool.
"Given this morning's news as well, with Derek (Llambias) leaving the club, maybe it has become a bit clearer now that it may have been more of a like-for-like swap.
"Derek did a great job getting the club back on a financially sound platform and he's left the club and Joe comes in, who knows the club and knows the players.
"If it is a like-for-like swap, he's somebody with more of a football background and knowledge. It makes sense for the club."
Asked what Kinnear was like to work for, the keeper, who will leave Toon after 20 years this summer, added: "He was very likeable.
"He was larger than life, bubbly on the training ground.
"He came in at a difficult time at Newcastle, he came almost as a fire-fighter and was only there a few months.
"But that inside knowledge he has already of the club will stand him in good stead.
"Sadly back then he was taken ill before a game away at West Brom but, as always as a Newcastle fan, there's never a dull moment."