So- my week of cold, icy refrozen snow has helped me figure some things out. (Please note: I am ignoring the performance advantages of klister as I BC ski through the Northeast mixedwoods, where forest debris is everywhere.)
1) All of the waxless-scaled skis I have- regardless of whether they are a negative pattern - suck on icy, refrozen snow.
2) In a XC context: on warm wet snow, all of the different waxless-scaled patterns I have tested perform reasonably well.
3) When climbing: flex pattern is the first big factor. Double-cambered skis (e,g, E-99/Glitt/BC70) do not climb as effectively as single-cambered skis. Soft-flexing 1.5-cambered skis (e.g. Eon/E-109/S-78) climb more effectively than stiffer, more cambered skis (e.g. E-99/Glitt/BC70).
4) When climbing: the overall length and position of the scales is the second big factor. For example, the current S-Bound line has waxless scales much further forward than the similar profile Madshus XCDs. For example: I believe that it is the position of the scales that is the largest contributing factor to the greater climbing performance of an S-Bound 98, versus a Madshus Epoch.
This fella's tests and comparisons of the E-109 vs. S-98 produce similar observations- although he does not attribute the greater climbing of the E-109 vs. E-89 to flex pattern, he does notice the longer and further forward scales on the S-98:
http://bwca.com/index.cfm?fuseaction=fo ... 6&confID=1
http://bwca.com/index.cfm?fuseaction=fo ... 6&confID=1
He observes that the S-98 has a very long grip zone, and very little camber. He oberves that- compared to the E-109- the S-98 has minimal camber.
I believe that the XCD success of the current Fischer Offtrack Crown has much to do with flex pattern + length-position of scales.
The sintered tips/tails of the current Fischer BC Nordic skis is a stroke of pure genius as well. The wax retention and polish I get on the tips/tails of my current scaled E-99/E-109 Crowns, is second to none for a waxless-scaled ski.