For me useing westy's 90% of my bites are after I have hit the cliffs or rocks on the bottom. Thats why I said clicking. I have caught very few fish where the bait is falling on the first cast and not hiitting the bottom, usually its on the fall but after the westy is bounced off the bottom a few times.
When the fish are finicky I try a westy/wired worm and can usually get hit, I believe its due to the noise it makes when its hits a hard object.
I mainly fish rocks and cliffs with these baits so I am going by my own experiance.
this year I been using westys /wired's an mainly my own version of a westy/wired worm and been doing pretty good.
If I run out of jig heads for my own worms I take the back hook off the westy/wired worm, this allows it to stick out and have a little more action. I found this to work a little better than the stock westy/wired worm, plus takeing the back hook out(for me) has giving me a better sized fish than having the back hook in.
I think its due to the fact that a small bass will hit the tail and if there is a hook on the tail it will get hooked, where a bigger bass will engulf the whole worm .