This is theoretically correct.
When Ralph originally installed the new mount and leg on his RV-6A, he felt sure that the ground attitude changed from what it was with the original mount and leg.
Since we had never actually installed one on an RV-6A at Van's we had no way to confirm what the before and after pitch attitude on the ground was so a custom strut length was provided to Ralph to get it where he wanted it.
This is also the reason for the
Disclaimer Document.
https://www.vansaircraft.com/wp-content/uploads/2022/10/RV-6A-EEM-warning.pdf
As has been mentioned in this thread, an RV-9A or RV-7A sits very close to level in a 3 point attitude, in contrast to an RV-6A standard build which sits quite tail low in a 3 point attitude. This should be true whether it has the legacy engine mount and nose gear leg or the new version.
In theory the ground attitude should not have changed just from swapping the engine mount and gear leg of an RV-6A to tthe new style because the RV-6A, RV-7A and RV-9A have always used the same engine mount and gear leg (except for a slight variation on the RV-7A if an O-320 engine was used but that doesn't change the nose gear leg geometry).