I found the whole excercise to be a bit too philosophical for me. Regardless of what you call it I think everyone would agree that UpToDate is useful. It is a great starting place but usually insufficient as a single source.
I was reminded about it today when I came across this paragraph:

Regardless of the merits of UpToDate, nothing breaks the illussion of evidence based medicine like an author throwing out a random statistic like "approximately 15% of the 1,200 patients who I have seen..." without a reference. This is the epitome of expert oriented experiential medicine and has no place in EBM.