[klickitat jim]

As long as the wort is clear there's no need to vorlauf. When batch sparging this is usually a couple quarts recirced back in. On my commercial fly sparge system I volauf for about 30 minutes, or until the wort in the grant is very clear and grain free.

It was a stupid attempt at humor. I dont vorlauf now that I recirculate... budum cha
Sorry

[Joe Sr.]

Every time. Except when I run run a little in the kettle and say, "Crap, the Vorlauf!".

Same.

[Jeffinn]

 I used to do it religiously. But lately I'm not seeing the value in it. Grain never makes its way through the bazooka screen and my runnings are usually pretty clear. I tried a few batches without a vorlauf and didnt notice a difference (and no, i didnt perform a super secret blind triangle test).
 It doesnt take much time or effort to do it but if theres no noticable difference then why do it?

[brewinhard]

I recirculate (vorlauf) two full growlers of wort carefully returning them back to the mash tun.  Then I start collecting into my kettle. Every brew, every time.