I have thought about this for a long time and it really bothers me as it doesn't make sense. To me, the term "push" is used on a map where both teams have the same objective on a symmetric map. "Push ctf" is basically the same as the dustbowl gamemode, but you capture with a flag rather than standing on a point with your teammates. My point is; we don't call dustbowl a "push cp" map. We call maps like granary and badlands "push cp" maps, since both teams have the same objective. "Push ctf" is, in my head, a map like ctf_2fort or any other standard ctf map. It just seems to me like we're spreading a confusing name for a gamemode that should be called "attack/defend ctf".