pannetone if he reads it, just suggest to him that 7 hours a day / 7 days a week is advice for those who have left it to the Easter holidays to start revising. It is how they can play catch up with DC like your DS.
Who knows? Maybe it is.
I liked the bit in the blog post that suggested studying everything 3 times to optimise storing it in long term memory.
To be honest, I thought it was a good post overall. The 7 hours a day of effective study is challenging. Too much for some, maybe, but not ludicrous to suggest.
The only bit that I really take issue with is the bit about no single day off for 3 months. I think that would be pointlessly stressful for anyone used to weekends, Inset days and 13 weeks off a year ( and never going longer than 7 weeks without at least a week off).