For archival purpose:
http://can-bus.996267.n3.nabble.com/Anybody-ever-run-an-MCP2515-at-greater-than-1Mbps-td1859.html
you are certainly right about 1Mbps being the maximum speed of the official CAN spec. However, some of us like to break the rules :)
I do :)
I’m using CAN for a purpose different from controlling automobile so my breaking rule would not cause any death.