If the GI Kentucky Derby all came a bit too soon for 'TDN Rising Star' Taiba (c, 3, Gun Runner--Needmore Flattery, by Flatter), Saturday's GI betPARX Pennsylvania Derby showed that he is close to--or is already--the finished project, enjoying the run of the race in before shooting clear in the stretch to defeat Kentucky Derby third Zandon (Upstart) by three solid lengths. Cyberknife (Gun Runner), who got the better trip and the better of a final-furlong tussle with Taiba in the GI TVG.com Haskell S. earlier this summer, outfinished Simplification...