From those stats we don't know, but app developers do know. I would say there are actually significantly more ipod app sales than iphone. It depends on the app, but the app developers that I hang out with tend to have more sales on ipod devices.

How do they know? I am an iOS developer and there is no way of seeing whether my apps are downloaded to an iPhone or an iPod (afaik).

Edit: That is, from iTunes Connect. Maybe your pals use some sort of usage logging/statistics from within the app.

If you're not actively collecting statistics from your users, then you're missing out on a huge amount of information.

The biggest gains for me have been:

1. when I could discontinue previous OS version (3.x) support because most of my users had transitioned to 4.x

2. It lets me know which features my users are actually using so that I can focus on enhancing and refining them.

3. It lets me know how many installs vs. sales that I have. And yes, this includes any pirated copies.

Users that mail you for support or hints, I generally ask them what device they use. There are a lot of iPod touches out there.

Maybe iPod touch users are stupid? In all seriousness, that's not a very rigourous way of polling.