Here "most" means "a plurality". Most dentists recommend Colgate toothpaste. Here it is ambiguous about whether there is a bare majority or a comfortable majority.

Understanding the Context

From the 2nd Language Log link: I searched on Google for the pattern "most * percent", and picked out of the first 150 hits all the examples like these: Welcome to the most wildest show on earth. Someone pointed out the most wildest and I was wondering if it was OK to use most with a word that ends in -est together.