I ran five days during the past week ending up with a 55 minute easy run in Golden Gate Park this morning. Shel and I ran parts of the DSE course and watched the leaders come by. The weather was cool but not cold. Mid 40's. The hamstring held up well. No even a shadow of discomfort or tightness. I may test it next weekend. That'll make it two weeks from the date of injury.
I have definitely decided to go forward with tempo and more mile paced work until I feel confident that I can handle faster reps.