But in the real world
Brocade cards work great as long as you don't need to reboot your servers... at which point using the brocade 1020 card with the brocade twinax cable results in waiting for your network guy to do a shut/noshut before the cards will renegotiate a link on the nexus switch.
Problem occurs in linux and windows.
Still waiting for an answer from brocade. In the mean time the solution is either move to optical cables and sfp+'s with the brocade or move to the qlogic QLE8142 adapter that unsurprisingly works just fine with the brocade and twinax cables >= 2m.
With regard to the speed tests the article nails it in the head in that your comparing the brocade card fully offloading iscsi to running the windows iscsi driver on top of a 10gig ethernet CNA of other vendors. Use the offload features of the other cards and present results for a range of current platforms before your tests are even worth looking at.
If your playing in this space get adapters from different vendors and prove them with the servers, cables, switches, and os platforms your going to use before placing the big order. Marketing spec's like this report may be correct but there never the complete picture. And JIT delivery has no room for hidden gotchas.