I have had good response from people using different detectors and what has surprised me is the possibilities of conditions that one might incounter at various sites. The size of the iron object in relation to the size of the coin, depth of target, and size of coil used on the detector.
Metal detectors that past the iron test, performed by people that used their own detectors are as follows.
Garrett GTI 1500
Minelab Explorer
Whites IDX with Mr. Bill's Mod's
Compass 100 Khz
GMT 1650
I am sure that there are other detectors that can pass the iron test, these are just from a small sampling.
My post was intended to address one specific area of metal detecting, not in any way to prove that one brand of metal detector is better or worse than the other brand. TB