Is the valve stem hole the same size as oem wheels?
Yes. Since the change to the newest sensors used by Ford, there have been 2-3 instances where the valve stem did not easily fit in the hole. No stems were broken during installation, and the stems did seat. The stems needed a bit more force than usual to pull them through. This issue is either a QC issue with the stems, or a wheel manufacturing QC issue with tolerances.
If the stems in question could be checked with a durometer, it may show a higher level of rubber hadrness making the stems harder to fit the hole, or the stems were manufactured too large. As drill bits begin to wear the hole gets smaller. If not properly addressed, the bit will stay in application too long and the stem hole becomes out of spec.
Whatever the case, or something else contributing, this is very, very rare.