Lpc2000

The CAN samples provied by Embedded Systems Academy are awesome, 
thank you!  But, can anyone explain the meaning of bit timing?  I 
know this has been discussed before but for the life of me it is 
confusing.  The User Manual is especially terse, just listing 
the "baud rate prescaler" in CANBTR register.  I notice in the 
samples the prescaler value is 0x1D which gives a divisor of 30.  On 
a 60 Mhz VPCLK this would give 60 / 30 = 2 Mhz baud rate.  Is this 
correct?  I feel I must be missing something.
James