--- Begin quote from "naturalstate"
I am assuming that the end goal is to be able to read it while playing at full speed vs. memorizing?
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I have always used tab simply as a way to learn a song. It's just a different way (as opposed to standard notation) of specifying note values and duration. I never considered (much less pursued) a goal of being able to sight read tab at performance speed. Sight reading of tab or standard notation isn't something I have seen in bluegrass. By the time I get a bluegrass song learned well enough to play it at speed, it has been committed to memory and tab is no longer needed.