I've already mentioned a couple times that my T2 is more sensitive to small gold than my Fisher Gold Bug and even my Falcon Pinpointer. In air tests, it picks up a .5 grain flake. A small "picker" reads to about 2.5 inches.
I've had it to some old gold mines, and while I found tiny bits of native iron, air rifle pellets and 22 slugs, all at good depth, I haven't swung the coil over a nugget yet. This doesn't surprise me, in all my years of prospecting with various detectors, I've only found one small nugget. I take my picker nug along on my trips and use it as a test. It has never failed to read it within it's range of detection. The T2 has handled the mineralization well, which varies from mid-60's to the low 90's.
I bought the T2 with prospecting as a primary use, so it will see a workout this summer.
-Ed