I have done Diploma in Copywriting course from Blackford center for copywriting and I passed in merit.I have been trained in writing advertorials for radio as well as TV commercials. Details were covered like the estimated words to be spoken in 10 seconds is 20-25 and in 30s is 60-65 words. Your product seems to be word basis i.e. script driven so creatively crafted sentences is required. .
The sample topics are the sort of topics which many educated persons do come across. As for me, I read Dale Carnege'a informal book about communication from 10th class to books like "Rich dad,poor dad".
I have worked as a senior marketing executive for sometime which gives me insight of the topic.
Thanking you,
vishram