Most people I know who have iOS devices have nowhere near that rather statistically problematic average.
I don't want to take away from that number - it's impressive in and of of itself. I just don't think it actually says much.
I looked through quite a few Twitter Twits last night after @iTunes asked what number of Apps do you have, and i saw nothing under 150 and the most i saw from one male (to me sounded like he was trying to impress) and he came back with a number of 2134 or something like that.
To me that seems ridiculous, but myself, just looking at my count, and think this includes my 9Yr old sons purchase's (i paid for them though) lol but i have 772 at this count.
Now i don't by any means use ALL of these. I started my account back in 2008 when i had a iPod Touch and i bought just games back then, then over the years iPhone, and now my iPad Mini.
On both devices i keep probably 10 games, and everything else is either Reference, Productivity, Utility Music and Photography. More so on my iPad i now have a App for just about everything i do on my Mac i can do on my iPad.
I know its a high number, but interests come and go, so, so do my Apps