I can think of one interview in particular done in the early 90's, which I have a video of, where Glenn makes a point of mentioning that Felder was a valuable member of the band who has often been overlooked. He did not make the comment in response to any question or discussion about Felder.
Also, I will have to read Felder's book again to look for instances where he compliments Glenn. The only example I can think of is him crediting Glenn for giving his all on Heartache Tonight when they were having so much difficulty recording The Long Run album.