Does the iPhone not open Google Plus posts in the Google Plus app?
On Android, when I click one of these links it opens the app and the reading experience is very pleasant. Maybe I've just been spoiled, but I find the experience to be pretty good.
This doesn't happen for me. I have a Galaxy Nexus with ICS, and I have Google+ installed and linked to my account, and this doesn't work - it opens the post in the browser. Is there some magic fairy dust that needs to be sprinkled into my microusb port for posts to be redirected to the Google+ app?
What's much worse, though, is that Google+ posts actually reliably crash the ICS chrome browser - as in 100% of the time. Whenever anyone posts anything on Google+, I have to open it in Firefox to read it.
Clearly Google needs to work on this.
Edit: Also, I think it's kind of silly that you wish people would stop publicly posting on Google Plus due to your phone experience being subpar. I think the problem lies much more with you and your phone than it does with Google Plus as a writing platform.
This isn't really that different than putting the post behind a paywall or some other inconvenient barrier to your audience. It might be a nice writing platform, but I think it's a pretty lousy reading platform.