Utter hog shit. Yes the 9.3X62 is a fine cartridge but it is not a 375H&H. The calibre difference is .009" the calibre difference between a 35Whelen and 9.3X62 is .009". Other differences (Velocity, energy etc)between the X62 and Whelen are less than between the X62 and 375H&H. So using their reasoning the 35Whelen is as good as the 9.3X62 so the Whelen is as good as the 375H&H.

Now if people want to say a properly loaded 9.3X64 is as good as a 375H&H then I would say they are correct.