Maybe?
But, bamboo *does* do it!. It turns out that commercial bamboo needles in sizes ~ US #4 - #6 do have a spring constant that is suitable for use with a knitting sheath or pouch. This opens up a world of fast and easy knitting for those of you that like looser fabrics. With # 4 *aluminum* needles, I knit faster continental style than using a sheath. With the # 4 *bamboo* needles, knitting with a sheath is much faster, than any other knitting method using any #4 needles that I have tried. ( I do not do ROSEWOOD! Test them yourself!!)
Knitting with such needles (and knitting sheath) has similar physics to knitting with #1 steel needles and a sheath. However, the stitch size is larger, therefore needle tip travel is greater, and resulting knitting speed in stitches per minute is less that with the smaller steel needles. However, fabric production in area per minute is greater due the larger size of each stitch.
(New "Clover" bamboo needles should be polished with "real" fine steel wool and waxed before use for extra speed.)
No data yet on the durability of bamboo needles when used with a sheath.
Trials were conducted with 8.5 " DPN so there are not the safety concerns as with very long steel gansey needles.
In addition, these days I am using 7.5" or 5.5" US # 1 steel DPN with knitting sheath for socks and cuffs. I really have tried a lot of ways to knit socks, and short needles with a sheath is the best that I have found. Lopi & # 4's for ski socks and house slippers, #1's & worsted for heavy socks, # 0's & etc. Knitting sheaths are letting me produce better socks, faster.
Aaron