MRHD100 and JVC GYHD200
 

My camera is the JVC HD 200 and I'm shooting 720p60 to both tape (as a back up) and the Firestore MR-HD100 (primary). The footage is being saved as Quicktime files. I'm editing on a 2010 Mac Pro with FCP 7.0.3

When I try to import everything directly into FCP, I get a warning that says "The following media files are not optimized for FCP. It is highly recommended that you either recapture the media or use media manager to create new copies of the files to improve their performance for multi-stream playback". Then it lists all the file names.

The item properties for everything shows that the clips are 1280x720 at 59.94fps and that the compressor is HDV 720p60. Why am I getting this message? Isn't HDV good enough?