This is a real touchy subject, but like Uncle Billy, i'm glad (so far) we can (and I know we discussed this before sometime too) do it civil like!
My take - I'm sort of like the theory on owner vs. employee, but also service and competitiveness.
So... One of Uncle Billy's employee's is booked to take me fishing for spots/largemouth and I tell him i'm realy interested in learning a few specific techniques on this lake, like Drop Shot, Senko and Flukes. We go fishing, he is a gentleman, nice, doesn't spend the time FISHING for himself, unless he's got the boat in the right position and has me all set... He TEACHES me the techniques i've asked for, we catch fish, I learn stuff, he's a great guy, and so on... It would depend on his competitive rates. If the going rate was say $250 for a 1/2 day, but Uncle Billy charges $300 for a 1/2 day, but that is because he is KNOWN for his quality service, I may or may not tip. The guy is a weasle he gets zip!
Specific example, with out names - I took a guided trip here in GA, told the well known guide 3 different times on the phone and twice in e-mails that I specificaly wanted to go after spots and LM NOT stripers. He confirmed. I show up at the dock early and his boat is ready and EVERY rod is rigged for Stripers! I politely remind him of my requests, he says "well I don't honestly remember that, but this is a great day for Stripers, are you sure you want to hunt bass? This is a tough time (march, upper 30's air temp, water in the low 50's...), we'd have much better luck with Stripers?" I politely explain the REASON I hired him, and at this time of year was EXACTLY that it was TOUGH bass fishing conditions and I wanted to learn from the best! He reluctantly rerigged a few rods for TX worm fishing, took me to a spot, showed me the techniques and we started catching a few bass. BUT... His cell phone goes off a few times and he comes back to me with "MAN the Stripers are SLAMMing U-rigs about 5 mins from here, you SURE you don't want to try??" I relent and we hunt and catch a LOT of Stripers in the next 2 hours, but after the first few it was like pulling a kid from a candy store to get him to get BACK to Bass fishing!!! He eventualy did, showed me some more techniques, and we docked, packed our stripers in ice/bags (as we did NOT bring a cooler as we were NOT expecting to go Striper fishing!!). SO, long story long... No tip. Would you have done the same? Oh and this is the owner of the guide service.
Trep