Post-mortem's are very useful, though often not welcome. I appreciate the top-line summary and the approach looks promising, but I don't have time to sort through the data or details. Both are likely common, so don't be disheartened by complaints :)
We did this research for ourselves and started with "by-hand" inspection of every dead startup we could find. and i can say we found almost every. so you can spend no time reading every story and read only summary - it contains all our thoughts and this is the thing we used to make decisions on Mentalium's strategy.