K_Mac, I would tend to agree with this but there are certainly exceptions.
The local boat dealership(Foothills Marine) has the best tackle shop In three counties and gets their fair share of business from all three counties simply because they are reasonably priced, will order most anything they don't have, and work well In tandem with the dealership on upgrades of trolling motors, depth finders, etc. Another Important thing they do, and this Is within reason of course, they have listened well and keep In stock what works In this part of the state. The two guys that run the tackle shop and each boat salesman are all fisherman and will never hesitate to try and help you catch fish or at the very least point you In the right direction.
I'm certainly not saying It would work everywhere but I do know they do well and each section feeds off the other.