As for the pedigree (or the one half of it your referring to as you seem to be ignoring the sire influence)…..
Boston Shuttle (his half brother) was indeed a sprinter, but he was by Boston Harbour who by in large gets sprinters himself.
As for him showing more "speed" than anything else….I would defy anyone who saw the race today to tell me that horse was travelling better 1 furlong out than he was at the line.