In 3.3.0.6, can you mix the CXF SE with the HTTP BC?  Is the CXF BC/SE tightly coupled?

There was some talk about the CXF BC/SE being tightly coupled.  At first I was thinking this was due to the use of JAXB in CXF versus XFire in 181 for instance.  However, if the ME is getting the XML, that would mean that the marshaling by JAXB is taking place in the SE, perhaps removing any tight coupling?