User blog comment:Jopjopjop/Volume 19 Spoilers/@comment-104.7.80.176-20150309142323/@comment-16281343-20150309195526

No. It is on the aspect of technique.

That speculation was built around a Devil can only inherit one trait. Either from the father's side or the mother. That was based on Sairaorg inheriting Vapula's Lion Tamer and not Bael's PoD.

Now onto the Gremory's, Rias is considered as a Power-type as she's more focused on empowering her PoD, but with regards to technical use of it, not so much.

But in Sirzechs, abnormal as he is, inherited both Bael's PoD and Gremory's magic talent which is showcased in his technique Ruin the Extinct.