Thank you all very, very much for your thoughtful input!
I guess the answer is that the gentleman who wrote that article was a little broad in his assumptions, perhaps a little too generalized in his conclusions?

I think I will do that little test - same light, same subject - all the same for a number of filters (of course adjusting for the exposure required by each), then perhaps take a little colour snapshot just to have as referrence. I was thinking of perhaps a collection of objects and plants and a person behind them. If nothing else, it will be fun.

I think I will probably go through a "phaze" where I will abuse my filters, then most likely settle down they are new, and I have not really played with them much.

Thanks again,

Peter.