I was thinking about this a bit last night. Rocky has a ton of speed rating data for deeper than their top 7 that's readily available and they have the guys to make any JV race quality. With that, we can get a ton more data points on Rocky and get a really clear picture of performance.
Heemeyer: 187/187/183/185/188
Lucas: 178/176/169/178/180/175/178
Tuft: 153/164/171/173/171/166/173
Jensen: 163/163/165/166/167/164/164
Richardson: 163/160/163/154/163/164/171
Kurtz: 155/157/159/166/158/159/146
Thomas: 155/150/158/164/156/160/162
Miller: 158/154/156/156/154/152
Clark: 133/130/144/153/152/154
Goggins: 157/DNR/115 (my understanding is that he went out very controlled and got to race hard the last 2 miles, so I won't count this as the low)/159/156/126
Carlson: 146/144/151/151/147/153
Beeler: 145/138/146/DNR/143/153
Ball: 140/137/150/151/146/150
Chugg: 138/135/94/152/150/145
Cole Reed: 135/128/140/145/137/134
Average improvement from first meet of the year to districts: +2.93
Average improvement from first meet of the year to state: +4
Average improvement from first meet of the year to season's best: +4.87
Average removing high and low: Heemeyer: 186.33 Lucas: 177 Tuft: 169 Jensen: 164.4 Richardson: 162.6 Kurtz: 157.6 Thomas: 158.2 Miller: 155 Clark: 145.5 Goggins: 156.5 Carlson: 148.75 Beeler: 144.66 Ball: 146.5 Chugg: 142 Cole Reed: 136.5
Average improvement from start of season to average performance: +2.8
In terms of time, from the first meet to districts, Rocky's top 15 ran just under 9 seconds faster in performance quality, meaning that all things held equal, if they ran the district meet at Caldwell, they would have run 8.7 seconds faster than they did to start the season.
From the start of the season to season's best performance, on average they ran 14.61 seconds faster.
On average, the average quality of performance was 8.4 seconds faster than the first meet of the season.
Per my previous post, the top 7 had improvements of 2.55 seconds from first meet to districts, 5.13 to state, 15 seconds from first to best, and 5.13 from first to average when using Tuft's first race on varsity. When doing the same, the top 15 average performance at districts is closer to 7.5 seconds, start to average is closer to 14.4 seconds, start to average quality is closer to 7.3.
My hope is that as I crunch these numbers for teams over the next few years, we can start to decipher trends and then make 80% accurate guesses at the end of the season within the first few weeks, barring injury or illness.