NSLocaleUsesMetricSystem always YES on iPad

Question

Hi

I am trying to decide if the users Region/Locale settings validates the use of Metric values (in this case if kg or lb should be appended).

I am running 3.2 on my iPad and on the simulator(Xcode 3.2.4). I have tried out a few different Region settings but I simply can not make it return NO for NSLocaleUsesMetricSystem

NSLocale *locale = [NSLocale systemLocale]; 
BOOL usesMetric = [[locale objectForKey:NSLocaleUsesMetricSystem] boolValue];

NSLog(@"The system is Metric: %@\n", (usesMetric ? @"YES" : @"NO"));

This even happens for language set to English and region set to United States on both the simulator and on the actual device.

I also tried NSLocaleMeasurementSystem and it too always returns "Metric", never "U.S.".

How will I go about deciding if I should use Metric or not?

Thanks for any help given:)

...could I be so lucky that the whole world changed to metric while I was sleeping:)