Samsung is preloading Google Android ICS edition on the new units of Galaxy S II that are being sold in the Indian market.
The update was released recently and is being delivered to owners of older units of S II.
The new units with ICS were imported to India in April. So if you are buying a phone with import date listed as April or later, it should come with Ice Cream Sandwich build.
The phone originally launched with Gingerbread edition.