iOS's option buttons? No, not at all. They're a near-pixel perfect copy of Windows Phone's option bars:
http://mobileworld.appamundi.com/cfs-filesystemfile.ashx/__k...
http://mobileworld.appamundi.com/cfs-filesystemfile.ashx/__k...
Looks very similar to: http://1.bp.blogspot.com/-u-3KNfy5n9M/TyG235X2rGI/AAAAAAAABH... and http://1.bp.blogspot.com/-KIyVJ4DBLdw/TyGbNsLn4hI/AAAAAAAABF... albeit with orientation or location changes.