I verified what you've noticed on the fairway
at hole #1 Kiawah just now.
17mph tailwind 7I carry is 134 yds.
4mph ~90 degree cross wind 7I carry is 134 yds.
However this doesn't hold true for a Rapture 7I from the tee
to a -7ft elev green (14 @ BPB).
17mph tailwind 7I carry is 148 yds.
0 tailwind 7I carry is 140 yds.
Using a GI-D ball btw and on or real close to center line hits.
You're actual mileage may vary.....
I avoid my 7I in the fairway if possible.