Yes I too have read this.
Reference:: Sikh Philosophy Network http://www.sikhphilosophy.net/jap-ji-sahib/4467-gifts-of-japji-pauris.html

I have a gutka at home with this infomation just after the forward and just before gurbani begins.
Reference:: Sikh Philosophy Network http://www.sikhphilosophy.net/showthread.php?t=4467

I got it sent to me from the States, I can't remember which person or organisation posted it to me, but they are handing them out for free, doing their good sewa.

Cheers,

lee.