This is an interesting debate, I make no secret of the fact that I use WA tools in the sites I build and this has brought me a number of enquiries exactly because I specialise in WA tools.
I would like to see a centralised folder structure and I think that naming it WA would be logical, after all if the client really wants to know what tools are being used on their site they only have to open up one of the WA helper files and read the copyright statement so......
I tend to agree with Ray, it is better for all of us if WA are seen as a tool of excellence