I'm not joking. Calfee blew it with the 2% toptube slope. Mr X thinks it makes the bike unstable. ROTFLMAO  
Interesting that the comment that sloping toptubes add no meaningful benefit or use because the same exact thing can be said about traditional toptubes. Other than the fact some tall riders like the higher TT to lean on occasionaly, there is no other compelling advantage of a traditional TT over a sloping TT design. In fact for out of the saddle climbing, comparing frames built with the same tubesets, smaller triangles should result in a marginally stiffer and more efficient frame. This is exactly why smaller frames of a given tubeset will build into stiffer bikes than larger frames of the same tubeset, smaller triangles. To compensate for the larger triangle to achieve a given stiffness, the builder inevitably ends up using stiffer, more built up and HEAVIER tubes. 
As far as the weight issue goes, with a sloping TT design you are shortening 4 pipes, the TT, the ST and seatstays and lengthening 1 pipe, seatpost. Hard to imagine some negligible benefit is not gained there in the weight to weight comparison for the sloping design - a point of interest to all weight weenies.
Now, anyone with a 2% sloping Calfee frameset, please turn in your steed to me before it falls apart on a descent because it is unstable according to Mr. X. LOL
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