ICG Gradeing

I was unable to find a PCGS PR70 Jefferson older than 1977, anywhere in the PCGS Registry, although that's heavily weighted towards CAMs and DCAMs. The oldest non-Cam Proof I found on Heritage in a PCGS PR70 slab was 1963. A 1956 that PCGS was willing to give a PR70 would be a six-figure coin, I suspect.

That should be a hint about ICG grading of Moderns.

I also like ICG...alot. I also agree they are the smallest of the "legit" TPG'S. All of my ICG coins, I believe are accurately graded. When I first bought some of my "ICG" coins , all of them crossed. Maybe I was just lucky.
ICG has always had a rep for being liberal with moderns. I don't necessarily collect moderns, but common-sense dictates that the minting processes should have become more refined overtime and you should see a higher population of higher end MS coins. BUT PCGS and NGC are the accepted authoritative TPG's out there.

As dom said. I consider ICG quite capable, just a little enthusiastic with Moderns. I'd buy a Classic in an ICG slab any day of the week.