I can only speak to the Wine Advocate.

What you have said is dead wrong. I my experience, they have tasted them all, blind if possible, and make notes on each at the time.

I have seen parker and rogavani taste the better part of 50 wines, scribble shorthand notes and write the reviews. I have seen them come back a second time, and exhibit amazing consistancy, both in their retasting, and in their taste compared to mine.

I have a high confidence factor that they taste every wine reviewed.

My tastes do not conform to theirs, but I cannot in any way dispute their integerity.