As I understand it, one of the core ideas behind the 3 Rax Timing Push is to have your army at your opponent's doorstep as Stimpack finishes, or at least have it completed as your army pushes outwards. However, the 1.3 Patch includes the following change:
Stimpack upgrade research time increased from 140 to 170 seconds.
30 seconds is a long time in Starcraft 2. As a result of this change, would it be reasonable to change the push timing to rely on another upgrade, such as Combat Shields? Will the 3 Rax push become less viable? How else could this change affect this tactic?