Thompson came to JFR from AJ's team this year. AJ is the leader in clutch finger design and clutch application. That is why many teams pay handsomely to lease AJ's fingers & clutches.
To get through the shake zone, crew chiefs dump timing out of the motor and then either shove a bunch of timing back to get the motor ahead of the clutch or let the clutch stay with the motor and bring the timing back slowly, depending on the track conditions, tuning preferences, etc. Depending when you take this timing out and put it back will either affect the 60' time or 60' to 330' split. I would venture a guess that on this particular run that event took place after .8 into the run. The 330' to 660' split is controlled more by when the clutch is allowed to totally catch up to the motor. This is one of the hardest parts of clutch application to control as there are several variables. One is the crew chiefs settings on the clutch controller, number of clutch fingers, finger weights (both by finger size and bob weight on each), finger radius, then you have clutch wear that changes lever angles, the more angle the more pressure, more pressure more wear, clutch finger stops set prior to the run, tire slippage, and motor power. With a hopped up motor, tight track, and maybe a softer than normal clutch disc, the clutch saw more wear and the lockup fingers hit their stops early and it took longer for the clutch to catch up to the motor which would show up in the slower time for this segment with a little slower 660' mph. The 1,000 foot trap is only 66' long and if a driver hits the chute just a tad early or shuts the motor off a tad early, it will slow the mph without a noticeable effect on the ET.
As Mike said, Cory's .810 didn't see the 330' cone, so adjustments had to be made and it looks like the stars were aligned and the adjustments made by the JFR crew were the correct ones for this particular run.
Timing sheets are bought by most teams at the NHRA events that give all the pertinent numbers so that teams can see where on the track their car is performing better/worse than the competition. It is a very valuable tool. This sheet is probably where Jeff is getting his numbers from.
As I said before, to me the times look very realistic. And I think you will see many cars performing at this level this year with all the little improvements that have been made lately.