With my 5.5Gen iPod (64MB RAM, iFlash-Solo with 256GB microSD in SD adapter), each of the three new "Tracks by" menu options now yields an almost instantaneous list. Fantastic! And this is with 12,025 entries in my complete database (as it currently stands).
For my part, it's unlikely that I will use the "Filename" option very much because all of my track filenames begin with track numbers, so an alphanumeric sort doesn't produce a particularly meaningful/useful order. As well, since the "Title mm:ss" option seems to be as fast for me as the plain "Title" option, I see no advantage to using a list that doesn't include track time lengths. But I am more than pleased to be able to have the choice of all of these now super speedy options.
Thank you so very much.