I cant testify first hand (yet). but Ern Grant refeers to catfish as a first class table fish.
The asians aparantly are very keen on them a dna catfish stew is a cajun staple.
The standard line is that they taste better out of clean water, and quit a bit of the muddy taste is in the skin, so skinning is esential.
Give it a go and report back... likewise on grinner.
cheers