I got 3" out of the Friday storm and DC basically got nothing, so I dont think thats a good indicator. This storm it just wasn't cold enough and no HP keeping the warm air from filtering in.
The GEM really sucked for this storm. It stubbornly kept showing snow even east of 95. The R/S line ended up north of 70. The Euro snow contours were probably the closest to correct, but still needed to shave 2-3" off the totals.