These evangelists maybe cordial to WP or WebOS, because they're no threat, but ICS -- they'll save their best faith-based sermons for it.
I think it's because they've been making this same criticism since Android first came out, and its UI is still laggy and stutters. It's starting to look like that is just a permanent feature of Android, rather than something which should be fixed "soon".
All their criticism boils down to this one thing: that Android doesn't have the same level of quality when it comes to UI interaction. They readily say nice things about the features, but the interaction model is still broken, and they keep pointing it out because its important to them. Its important to lots of people, and thats probably why the iphone is selling so well.
Its obviously not important to people who prefer android, and thats fine. But since its not important to them they don't understand the criticism and ascribe people's love of the iphone to "faith" and "evangelism".
A lot of the criticism Apple followers have of Android is that it feels like a 'good enough' iOS alternative designed primarily to prevent Apple achieving dominance. Having lived through the 80s, many tech enthusiasts are keen to see a competitive industry with a focus on quality, design and innovation. Google facilitating Samsung producing iPhone knock-offs doesn't seem to contribute to that.
That's not to say that Apple never makes a good product or Google can do no wrong. They both have their fair share of successes and failures.
Sorry to sound nitpicky, but I was confused by the rest of your post after reading the first sentence.