The sources pointed out that the iPhone 6's shipments in the second half are expected to be 3-4 million units lower than the original expectation, as the supply chain gradually shifts some of its iPhone 6 capacity for production of the iPhone 6 Plus. But most component suppliers' current inventories are not sufficient for extra iPhone 6 Plus orders, and device manufacturers also do not have sufficient production lines for related assembly. Therefore, the retail channel may need to wait a while before seeing a signifciant increase in iPhone 6 Plus supply, the sources noted.
This follows a previous report from the site which said it appears as though 60% of buyers are choosing the larger iPhone 6 Plus.
We'll let you know if we ever get an official breakdown from Apple. Please follow iClarified on Twitter, Facebook, Google+, or RSS for updates.