Rick,
I as told by an employee of Quantec that it's a great minefinder in brownfield sites, but much less so on greenfield.
Someone told me that the ovoid anomoly is a granite intrusive, and whilst that is only hearsay, it could be. If you speak to a geologist he will confirm that many properties have a magnetic anomoly, but most of the time it does not turn out to be gold.
I still believe Tesoro is a narrow vein high grade property.
It;s a shame they just didn;t put a drill straight into the middle of the ovoid instead of "defining the edges" as I think they described it. I have not met anyone that thinks that is the proper way to do it!
The old adage about "don't drill it or you could kill it" seems apt.