I wear a size 14 boots are the large...
I wear a size 14 boots are the large bindings to small?
No, I think you would be ok. I had 13s in Burton boots at one point and also have Burton Custom bindings, and they were fine. So I don't think one more size would do much. The bindings have an adjustable plate by the toe that you can extend out like four notches. It adds a little length to them for ya.
This is to ask another question, What about the straps i bought 14s burton boots and bought the new k2 sonic bindings and one of the straps is having a hard time catching is it going to be like that always with such a big boot?