I think the pitching speeds she mentions are realistic. A DI capable pitcher should be in the 60 - 63 range
in game situations, or generally 58 - 60 if strictly a junk pitcher. So, the rule of thumb of hitting
game situation 60 mph as a benchmark for DI is realistic. Back in the day
when QD was Ringor, and at most of the major indoor winter camps, the pitching surface was artificial turf. There was no regulation pitcher's plate with a characteristic lead-edge hole the pitcher could use as a push-off point. When you take away the leg drive, you also decrease the average pitch speed by several mph. Also, a
relaxed pitcher is a
fast pitcher. So, add in a good case of "camp nerves" and take away the leg drive, and it's no wonder that none of the charts reflect a bunch of mid-60 speeds. The camps and their charts are merely guides and indicators. I think the DI coaches are aware of the limitations. Besides, if a kid is on their radar, they will be gunned by interested coaches
several times in game situations at summer showcases in games.
For running, timing done with a stopwatch is all over the map, and timing methods vary so much that it's no wonder there's so much confusion. I still think anything sub-3 home-to-first is a decent DI speed. Think of it this way - a sub-3 won't QUALIFY you for DI, but anything consistently OVER 3 will probably DISQUALIFY you.
And why are so many parents so concerned about benchmarking a kid's pitching speed at, say, 12u? Things can change so much (hopefully for the better) in 4+ years that speeds at 12u are probably irrelevant! And don't even start with 10u! If mechanics and all the other stuff are in-line, speed will take care of itself.