Yes, numerous among us do it that way. Some of us have only one listener who is critical (my own situation) and we cluster the mic pattern more tightly around the MLP. This is contrary to Audyssey's instructions, so must be regarded as somewhat arcane, but some have measured their response using the mic positions as instructed and also in this way, and not only do they hear an improvement from clustering around the MLP, but they also measure an improvement. YMMV.
If you search this thread you will find considerable discussion of the topic.