i think generally that 'software' is higher tensile requiremeant than hardware; to allow some for more wear from ropes than krabs etc. i think 5k is a good, round number from other disciplines; that predates such specifications in tree work and became natural standard for hardware.
Most uf us climb on a DdRT, that has 1/2 bodyweight on each leg of support; then the 'newer' friction hitches that pull from both ends place 1/2 of the 1/2 bodyweight on each leg of the prussic/ cord. i think of it as a Tautline or Blake's being tensile of weakest part of cord X the tensile loss of a choked eye to eye sling, bent vs. a VT, Distel, TK, Icicle etc. being of the strength rating of the tensile of the eye to eye sling X Basket, bent. If you notice on round and eye to eye industrial slings, there are 3 ratings. One for linear, straight eye to eye, un bent tensile; thus the tensile of the device. A sling that chokes it's own self back to secure is ~80% less that sling tensile; even though they both have 1 leg of load support. The choke position bends the weight bearing Standing Part, leveraging the force in the line/ becomes a multiplier above 1; so tensile potential of line is 'consumed more' than if multiplier is 1; unbent line.
A Basket position proper offers 2 unbent legs of support; or Linear / Base Tensile X 200%; a multiplier of .5 X Load. Even though after each of these base grips, the cord/line is then bent further towards saddle; entering another multiplier against potential tensile capacity(?). You can't escape the effect of the previous multiplier that loading both ends in Basket is 2x Linear/Base Tensile, and Choke(bending self with self) is .8X Linear; so Basket (Prussic)is 2.5X as strong as Choke(Tautline/Blake's) at this point in rough calculations. Also, the smaller diameter cords, can have a lower tensile percentage loss from the tight bight around a krab and host line too; if their stiffness X height leverages tension in the line less than same for larger diameter rope(for friction hitch) choice. 3/8" Flat Tenex has fair tensile and little tensile loss on bend around host line or krab for friction hitches IMLHO. Some recon stuff is pretty thin line, but single use. i think we need stuff beyond single use diameters, just for wear etc.
But, i think you can be more confident here, i think most that have passed this way had similar questions/ doubts at some point. Besides, some of the tensile numbers come out unexpectedly in your favor; except if you find yourself running the saw in your lap!
Cool little piece of info, Thanks Tom!
opcorn: 
