Yeah, the config command affects memory card access speed. I think all it does is delay or slow the access to the memory card avoid the corruption. It fixes some games with this issue, but side effect is slower loading/saving with memory card. Burnout 3 isn't affected that much by it...only a few seconds slower.
This one should be a bit faster:
Code:
3D 00 00 00 89 3D 00 00 0A 00 00 00 01 00 00 00
60 9C 18 00 80 3F 02 3C 7F 3F 02 3C 13 00 00 00
00 00 00 00 DC 9B 00 00 00 00 00 00
Not sure if there is a command on PS4 to delay memory card access.