Compared to the console and PC gaming world I would imagine the disparity there to be even greater than this. EA, Take Two Interactive, Nintendo, Capcom, Microsoft, Activision Blizzard, Sega, Sony, etc are likely the top 0.01% when it comes to developers and probably take in almost all the (it's too damned early for me to actually do the research, sorry). The important difference here is that in iOS, as of now, the top 1% is only taking in 30% and that those developers are made up of a far greater number of indie studios.