Its hard to believe because the evidence overwhelmingly suggests that he (and Russ Brandon) overruled Doug Whaley during the last coaching search over at OBD.
(The rest of this is pure speculation and opinion)
Now, Bylsma is most likely who Pegula wanted, but that doesn't mean that he also isn't who Murray wanted. If that's the case, the good news is that it appears that Terry has kind of learned his lesson and let his football people do their job.