Most of the Marketo clients I work with are based in Australia. I've noticed that the State field, even when mapped to SFDC fields, always defaults to show a standard set of US State picklist values.
Impact:
1) When State is used as a Smart List filter, the dropdown shows US States even when there are alternate values on records in Marketo. It would be good if the drop down looked up values in the database, like other field filters.
2) Form picklist defaults to US States, which although customisable, is a pain to have to overwrite each time with custom values. Would be preferable to default to the picklist values on e.g. Lead State or else, just blank.