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Marcia - 9:02 pm on Feb 28, 2002 (gmt 0)
There's also a difference between task performance and consulting. It may take 15 minutes to tell someone to change something on their site and why, but it may have taken 100 hours or ten times that to be able to know in the first place that they'll get banned from search engines for what they're doing. In a case like that they're paying for the value of the information they're getting, but the COST to the provider has to be measured in terms of what it's taken to be able to provide the information.
Regarding hourly, there's a difference between the level of preparation and research, relative value of the skill-set and the knowledge and experience involved for different types of work.