My opinion of gurus, and I assume that you are talking about Internet marketing gurus, are as follows:
- they are very interested in your money and not so interested in whether their customer gets what they need.
- on the whole, their products or advice while not worthless, tend be rather generic, and definitely not worth what you pay for or what the ads claim.
- most products are full of hype, very nicely packaged and advertised, but doesn't really deliver what was promised.
- many products simply rehash old content in new ways.
Having said all that, I'm sure that there are gurus out there who really deliver and are worth their weight in gold. But, the trick here is how to cut through all the hype out there, and find the genuine article.