Well, first of all, iOS and Android have similar market share in the United States. Throughout most of 2015, it was 43% Apple, 52% Android. comScore is an industry standard for reporting these things:
comScore Reports September 2015 U.S. Smartphone Subscriber Market Share - comScore, Inc
Now, take that and apply the fact that iPhone users have a significantly higher household income. They're nearly 50% more likely to make over $125,000/year, over 20% more likely to have a graduate degree, and be in a professional job, while Android is more likely to be a computer/technical job.
So, the Android users on this forum are more likely to be an affluent and tech savvy subset of Android users (as demonstrated by the phone models being mentioned here), while the majority of users are looking for a low-cost alternative to Apple.
The poll results are probably reasonably accurate, with the exception that (like mentioned earlier) Android users tend to be more vocal because they feel like they're getting less attention than Apple. It's frustrating because the media and accessory companies seem to talk disproportionately about Apple. However, a lot more models and companies are competing for attention with Android. On a company basis, Apple has 44% share, while Samsung has 28%, LG only has 8%, Motorola has less than 5%, and HTC has less than 4%. So, while Android is more popular, no Android companies (or phone models) are more popular.
As I said earlier, I'm a strictly Windows PC guy. I used to run Linux boxes and load-balanced Apache web servers. I've been a programmer (PHP, Perl) and never once owned a Mac PC. I've even rooted Kindle Fires to run CyanogenMod. So, I'm not an Apple fanatic, but I do like my iPhone/iPad/Watch combo. I think I've built so many PCs that I just want my phone and tablets to work without customizing, like my television set, but I totally get the attraction of Android for the tech crowd.