Neil,
No, it is a validated doctrine of Biblical Theology
I've listed to you for a long time (Here, Channel C and elsewhere) and I know you grasp the problem, as the math is really quite simple:
"God’s infallible Word depicts this group as ‘coming out of the great tribulation,’ being survivors of it, living right on into God’s New Order without ever having to die. (Revelation 7:9, 10, 14; John 11:26) The early members of this group are now in their 60’s or 70’s or older. Jehovah did not allow the ingathering of this group to begin too soon. The “great crowd,” including many of the earliest members thereof, will survive into the “new earth.”"
Fast forward the clock 40 years and it is clear that an adjustment is on the horizon.