AFAIK, one or more squadrons is classed as IOC
the numbers seem to change with the wind, but isn't the usn getting more f-35 and the usaf 5 less a year for 5 years?
you may not be aware but sweetman wrote this 2 days ago. "Under the 2017 budget plan, the Navy’s total F-35C buys between fiscal 2015 and fiscal 2021 will total 74 aircraft – more than the 64 planned last year but still fewer than the 78 envisioned in 2015."
the gap fillers are the existing orders from those non-partner nations, aren't they? they weren't on the planned procurement list from before.