Verify as a separate job?

Hi,

Another real quick one hopefully..

I was pretty sure when  implementing Backup Exec I read somewhere that verify as a separate job was better than verify at the end of the job because verify at the end of the job meant that it was verified against the source of the backup (I.e. the source was read against), whereas verify as a seperate job freed up the backup source?

Is this true or am I making this up?! If it is true can anyone point me to the KB?