Strange, I've not found Delta 100 to have a long toe in any developer I've tested it with. In developers including D-76, XTOL and even Perceptol I've found its curve to be nearly identical to that of TMX, with Delta having only a very slightly longer "toe" (and I mean a really small difference), and slightly higher highlight contrast. If developed in DDX, Delta does slightly better on speed and toe contrast than in other developers.