In contrast to Asimov's column in the Times, the WP column is largely an excuse for reviewing a category of wines. Although the reviews weren't given here, he gave decent reviews and, more importantly, information on how to find the wine in the area, not always easy to do with Dressner wines. The column is written for foodies who want to buy a bottle of wine, basically, and should be taken accordingly.
The abysmally low level of DC wine knowledge may be taken from the fact that Cole, Maureen, occasionally Bob Semon and I are the DC posters to this bored. You may aptly generalize from that.