The average rate for computer transcription is 33 words per minute.[1]
From experience, the average secondary application essay is about 500 words. The average secondary application also has about 2 essays, giving us a total of 1000 words per secondary application.
Given that we grew up in the computer age, and that people religiously using SDN probably type faster than average, I'll make the conservative estimation that SDNers type at a rate of 50 words per minute.
Since the secondary applications require very little thought, though thought nonetheless, I'll knock the average transcription rate down to 30 wpm. That is a full 20 words per minute devoted to thinking, bull****ting, dazzling, thesaurusing, lying, embellishing, &c. If you type any slower than the said 30 wpm because of the thought aspect, you are just plain stupid. Caribbean, maybe?
So, 1000 words divided by 30 words per minute gives us 33.333 minutes devoted to each secondary application.
If a student applies to 20 schools, receives 15 secondary application requests, and doesn't regurgitate or recycle any of his/her essays, it should take the student a mere 500 minutes to complete the secondary applications, or 8.333 hours. Since most students spread the secondary applications over a month (or more), the student will spend approximately 17 minutes per day for one month completing all 15 applications.
Note: most students do not complete 15 secondaries, and most students do recycle essays. Since about one in every two secondary essay is roughly the same prompt, the student is essentially spending half the time writing the essays, or a grand total of 8.5 minutes per day. It takes me more than 8.5 minutes to take a crap.
In conclusion, secondary applications should not be given anything more than a quick thought!
1. Karat, C.M., Halverson, C., Horn, D. and Karat, J. (1999), Patterns of entry and correction in large vocabulary continuous speech recognition systems, CHI 99 Conference Proceedings, 568–575.