That is a really great article you have written thanks.
That comment at the end about a freshness boost, that is so true. It seems that for the first week an app gets a massive boost for being new, it is reflected in download numbers. I am pretty sure you get a bit of a boost from doing an update as well, as I seem to get a bit of a boost in numbers after an update, and I can't think of any other reason for this to happen.
Also I have heard that having too many words in the app title can reduce the strength of each word. Not sure if there is anything to back this up, but would be interesting to know if anyone has noticed this. If you have say more than 10 words in the app title, does it actually work against you?