He's not refusing to put on the store. He's refusing to go through a charade of "certification" to assist MS to put it on the store - essentially to assist them in closing down their open platform by getting all the popular titles into the closed ecosystem. If MS will open up the store put it there without certification then I suspect he's fine with it.

While it would certainly have been more consistent to withhold the iOS port, there was no equally good open alternative on that platform, so it would have been a fairly futile gesture. On Win8, having independent games continue to thrive and ignore the Metro store will make a tangible difference to Microsoft's ability to shut down legacy apps in the future. So I can sympathise with why he would treat these situations differently.