I have a pocket trumpet with a tone SO superior to my Gretsch standard Bb. Is that the nature of a 'pocket?'

That's been my experience. Pockets tend to produce a clearer tone, although I happen to LIKE the sound of a regular trumpet better.

...Okay, I had ulterior motives for answering your question. Since you don't allow people to contact you by email, I had to find some way to contact you about your answer to my question. Can you perhaps remember the exact title of the book? I tried searching for it, but without the precise title, it's kinda difficult and I'm not getting any results. Anyway, could you email me at fenris121@yahoo.com? Thanks so much. ^_^

Yes, Pocket's always have a better tone.