> You know, I'm not sure.  I've seen the 58% figure many times, but there
> seems to be a lot of contradictory "information" on this.

I seem to recall reading - somewhere (maybe here?) - that gluconeogenesis
is a very inefficient process, and only occurs when the conditions are
right. Seems like 58%, as a rule of thumb, is high. I would suspect it's
close when eating very low-carb, but probably not nearly as high when
eating a more "normal" diet.