Hello,
I have downloaded the geo performance report for one of the account and compared the data with the adwords UI, I found the difference in data.Some of the locations are not reflecting in adwords report and even there are difference in numbers looking into statistics like clicks, conversions,impressions etc.The report downloaded via adwords api is not reflecting the same and exact data as displayed in adwords UI.
Please look into this issue.
Regards,
Chirag