Not sure why this should be downvoted; G+ really is an atrocious mess when one tries to view it in most mobile browsers. This all applies to Android too, amazingly enough. If Google wants people to use G+, then they really do need to get it on a javascript diet -- or at least start seriously testing it, starting with their own devices.

I got the Galaxy Nexus on release day. Upon trying to visit a G+ post that was linked here (the one about Goog making some guy's daughter cry), it consistently crashed the browser. Every time. Within seconds of load, clearly while doing js gymnastics. A friend with the same phone reproduced. Previously I had seen occasional G+ page crashes or hangups on a 3.0 tablet (TF101), and had a pretty dismal experience with G+ pages on 2.x, but this was outright killing the browser on every single attempt to load it. Whatever the problem was, it didn't go away until several days ago. And while it may no longer crash, G+ is still stupidly sluggish in the browser.

All of this on Google's new flagship ICS phone. Why would I put time into engaging with G+, when it seems like they're drunk on javascript bloat and have no one minding the shop on actual end-user experience? If people will have a terrible experience or need to download a dedicated app to view my posts, that's a critical fail. Nevermind these "big improvements'. Get the basics done right first, goog.