They seem to think a cell phone should function well as a phone!

You mean recordings, not music. The signatures are those of known recordings. Google's search won't find your unauthorized performance of "Hard Day's Night"; it's searching sound, not notes.

sacrilegious content

I think you mean sacrilegious expression. Or sacrilege.

"[some say] we're doing a better job making our products more secure than anyone else"

Jeez, how many levels of indirection is that?

Are your products secure? Or not?

I'm doing a better job turning water into wine. I can't do it. But some folks say I'm doing a better job making water more like wine than anyone else.

content providers and advertisers will need to start thinking about a data budget

You mean media providers.

The content could usually be conveyed with far fewer bits.

Rewarding those who get to the point could be a good thing.

I don't need flashing graphics to tell me it's gonna rain tomorrow.

"It's going to rain tomorrow" will do. Same content.

the Kindle bookstore as a content provider

You mean media provider.

The content, if any, of the works is provided by the authors, artists, photographers, and so on who created them.

"Deploy" means station in the field.

Excellent points. The case is hardly compelling that "it's safe for supertaskers". It's equally likely that something else entirely was going on with those 5. To make the case that this is safe under any circumstances would require far more convincing data than this.

I take it that you believe "content" means "that which is contained".

"Content" means the substance or subject matter of a work. It cannot be copyrighted.

You mean media, or expression, or product. The content, if any, cannot be copyrighted. Also you don't mean infringing, you mean unlicensed, or pirated.