[Cboldt]

Not one of these networks called yesterday's Bolton vote a filibuster when, in fact, that was exactly the case. In my book, the fialure to get 60 cloture votes is a filibuster. Am I wrong?

It depends on the reason for hanging fire on taking the vote. If the reason is purely to prevent the body of the Senate from giving its "advice & consent," then blocking the vote is a filibuster.

If, on the other hand, the reason for wanting more debate is to help the Senator make up his mind, or if the Senator had something to say to the others, but was denied the opportunity to say so, then voting NAY on cloture is appropriate. Cloture is intended to permit all sides to be heard before taking the vote. It is emphatically NOT to avoid altogether, taking the vote.

[TeleStraightShooter]

I digress, are you suggesting Miguel Estrada was not filibustered the half dozen times he failed to clear cloture due to repeated "informational requests"?
How many failures to clear cloture does it take to make a formal filibuster?

IMO it takes one.