Nice to know that it is a common problem. I have it too. Specialized recommended size 41. I bought their entry level with 3 straps and i get numb on my toes and after a while, my hands!
I then sold my old shoes and bought a 42 specialized comp with the BOA! Same numbness came back this morning. Hands are still bad too...
My bike has the Gel wraps and i even bought the Gel gloves. All from Specialized. They also did a bike fit for me and still this problem persist.
Any other ideas for me to try? Not forgetting my lower back! hurts aswell...
Thanks in advance.