I'd say from his position description, Danny fits the description of professional. My defination would be "anyone who derives most or all or their income from use of the the software.
Funny, perusing the Pinnacle Studio forums, people are constantly flipping graphics cards in and out, debating whether or not to install an OS release candidate, etc.
Can you imagine a taxi cab driver tinkering with his engine Sunday night installing non oem parts which may or may not work better?
"Hey boss, I have to replace my engine, a piece of one of these newfangled sparkplugs broke off and cracked a piston."
Good points, John
I would also add to my definition of professional that "professional" implies, not only the money involved, but a certain high standard of quality.
That does not mean that consumers cannot produce a high standard of quality. Sometimes they can produce very high quality.
So "professional" can also be used like this: When I saw the result of his editing I was surprised at the professional quality of his technique"
By the way, as you mentioned Pinnacle, I think it would be correct to say the following:
Pinnacle is related to Avid in the same way that Roxio is related to Sonic.
Liquid is the high-end of the Pinnacle group and DVDitProHD is the high-end of the Roxio Group.
Avid and Sonic have their own professional tools, that have been around a long time before either Pinnacle or Roxio were acquired.
Regards,
Douglas