Sipple actually talked about that in the Husker Extra podcast last week. It was his article that called out Dedrick and his GPA situation and he admitted he felt sort of uncomfortable about it all after a conversation with Mo Barry.
Apparently, Sipple was interviewing Barry after that Dedrick/GPA article and Barry brought it up at one point during their conversation. Barry wasn't upset at Sipple but was upset at Dedrick's coach. He felt the coach shouldn't have gone into that detail (which I agree with). Barry also pointed out that he was incredibly embarrassed coming out of high school because it was public knowledge that he didn't have the grades to get into some universities. Essentially, 'it's one thing to have your toughness called into question, but your intelligence is something else.'
Sipple said it was a sobering conversation and made him rethink how he would cover that kind of stuff in the future.