No. Well, yes. But it’s more complicated. Google wants eyeballs, so ignoring a big platform like iOS completely is not really an option. I don’t think you understand the business Google is in.
I think Google is going to go full on with Motorola and start selling their own phones. If they can manage to grab 10 or 20% of market share, they'll make way more money than with mobile ads now. And with HTC and Samsung eyeing on Windows8, Google may be forced to ship its own phones anyway. That's just my opinion obviously but it's easy to see they're taking Motorola very seriously (and is not just a patent deal) given that they put one of their best guy in charge.
iOS users greatly outnumber Android in mobile internet use hence it would be stupid of Google to leave money on the table and not build an app.
Worldwide: Android beats iOS slightly. http://gs.statcounter.com/#mobile_os-ww-monthly-201108-20120...
Europe: iOS beats Android slightly. http://gs.statcounter.com/#mobile_os-eu-monthly-201108-20120...
North America: iOS beats Android by 10% http://gs.statcounter.com/#mobile_os-na-monthly-201108-20120...
South America: Android beats iOS by 28% http://gs.statcounter.com/#mobile_os-sa-monthly-201108-20120...
Asia: Android beats iOS by 10% http://gs.statcounter.com/#mobile_os-as-monthly-201108-20120...
Akamai's stats show a very different story - http://blog.cloudfour.com/explaining-the-ios-and-android-mob...
Also if you aren't a "major site" how much do you care that most their mobile users are on iOS? Maybe that means you should be pushing Android compatibility even harder if Android users are more willing to try out smaller brands?
The lesson here is not that iOS rules and Android drools or any other nonsense. It's that you should know your market.
Source? I hate to be the one to ask for sources, but this sounds completely wrong.
Mobile browser share
Safari: 66.2%
Android: 19.4%
Mobile OS Share: iOS: 65.7%
Android: 20.2%Android: 28% iOS: 24%
It's easy to find web brpwser stats that validate your opinion.