Is this where the shift light is set, where you're pulling the shifter, or when the transmission actually engages? These are three different times/rpms.
I leave with my hand on the steering wheel, and by the time I react to the shift light, reach the shifter, slap, and the trans hits 2nd, it can be 700 rpm past the shift light rpm setting. High gear is far less of a difference, but that 1-2 shift is critical. I use an Auto Meter Ultimate Playback tach, and offset my shift light(s) accordingly. This should be basic stuff, but I've met some people that have raced for a very long time that had no idea where they were *actually* shifting.
I agree with others that much of the ET you're looking for is in the first 60'.