Right on. Yeah only in the sample did I see big differences between client-side and server-side values. My commercial code gives correct acreage.
Thanks for checking into it. If we didn't have clients using Windows 8, I really would not care. But you know how that goes.
I ran more tests on Windows 8...
* Firefox (latest version) does not return NaN for area.
* Internet Explorer 11 does not return NaN for area.
Getting the area using client-side GeodesicUtils in Windows 7 works on all browsers.