Really, I don't know that much about wine myself; I'm just making a weak attempt at my uncle's usual stylings (he's a wine journalist working for, of all things, a wine-kit manufacturer--so a bit of an apostate in the industry.)
Relevant article from him: http://www.timswineblog.com/2011/01/robert-parker-is-not-the...
Considering how most other defenders have reverted to simple knee-jerk "it's obviously not bullshit, I go tasting all the time" reactions, possibly without even reading the linked article, I salute (and update) you.
Edit: refined text to clarify meaning. s/not exactly winning/not entirely winning/