Now your right about them having a decent signal over North East DFW, and non existant at night, and your right about their audio not packing a lot of punch, but there is definitely processing there.
Consider this, KAAM is low rated because they lack musical focus, have colon blow infomercials in the afternoon and on the weekends. KAAM just downright is no longer good radio.
IMHO, if KGVL were to buy out and take over KAAM, the ratings would most likely increase.
KGVL has musical focus and direction. and sure they make mistakes, and occasionally sound small market, but come on, you've had a grudge against this station since day one. They Try with what they have, and I think they do a darn good job at it. I'm glad they are playing music no one else dares too. KGVL reminds me so much of my own station its crazy. I consider KGVL an excellent alternative to audiences alienated by KLUV, that don't want to put up with KAAM.
I think it could be KGVL doesn't subscribe to the DFW book. Like KJIM.