Didn't I read somewhere that a higher bitrate was planned? I'd be surprised that it's set at 44.1 and is intended to stay there.
Yes, it's my opinion that most pro recordings are made at 44.1, and that opinion is based on it being true!
Personally I prefer 88.2 or 96 but it's a lot more tricky and sometimes impossible to work that way meantime.
You think that the SA-CD is not pro?