I haven't grown USC's Colombian Gold, but I've grown Col'Jam, which is half Colombian Gold and half Jamaican. That's an outstanding smoke, and I generally trust their genetics to be closer to the source than World of Seeds.
I have a friend who has grown the WOS columbia gold and gotten to the fourth generation outdoors in southern oklahoma. He said it produced like crazy and has grasshopper resistance. The CG72 I sent him came from underground and it was more fragile, thinner leaves and didn't do well with Oklahoma grasshoppers! He saved it for a cross, by taking it in the greenhouse and cloning it. He will use it as an outcross for WOS Columbian gold. Also sent him some ACE panama for a back up plan.