I spoke to my dealer earlier this afternoon and he confirmed that F31's are being built in under 3 weeks at the moment, only longer if you want the aluminium hexagon effect trim, or items from the Individual range.
2016 BMW 340i .. on order, ETA w/c October 17th
2016 Golf GTI .. short term lease
2014 Lexus NX .. gone
2012 BMW 330d .. gone
2009 MB C250 .. gone