From Warwick Queensland.
Ah, producers in Australia would be promoting their own skills, stuff & looking for ways to make more $s.
If Mr. Lovett had brought exported, renamed .wav files the producer wouldn't have known if they were recorded at home, in a studio or from BIAB. Except for a stereo drum track I suppose. Then again, if the drum "stems" were used even that would be less of a give away and could be interpreted as Ez Dummer stuff or something else.
What are the circumstances? Did Lovett take his files to be mixed and mastered, did he take BIAB with him, did he go to the "producer" to track his vocals against the backing? These things aren't stated and each makes a difference to the story and the honestly/ethics of the producer.

Cheers
rayc
"What's so funny about peace, love & understanding?" - N.Lowe