I'm not sure if this is a Carnac issue or a problem with MC17 in general, but the bitrate field for video files now seems to be populated with the "Maximum bit rate" as shown in MediaInfo. In previous versions, the bitrate shown was much lower. While the value is correct, I think a more representative value would be "Overall bit rate" or plain "Bit rate".
I've listed a couple of examples from MediaInfo below:
File 1:
Overall bit rate : 10.4 Mbps
Bit rate : 9 786 Kbps
Maximum bit rate : 38.3 Mbps
File 2:
Overall bit rate : 13.9 Mbps
Bit rate : 13.2 Mbps
Maximum bit rate : 38.3 Mbps