Generally, you will see a jump in speed from those with the timing/sequence to be able to detach at 3. Replanters use different timing/sequence.
Thanks Ken and I think the word "generally" defines it well. 3 is generally a good place to be looking for and perhaps should be the target. But I would encourage others that if they are off the mark a bit not to worry about it.
IMHO, 3:00 is not an absolute as shown by many examples on this thread. Again, IMHO. Earlier in the thread it was stated that it is similar to landing at a 45. I think that was a great analogy as not every girl is going to land at a 45 but somewhere in the area and using 45 as a target will likely get them to where they need to be mechanically. Same with detachement IMO.