Hmmm... seeing as stainless steel is NOT a paramagnetic material in the first place, seems a bit weird to heat treat it in order to remove a property it doesn't have. You might as well say "we cleaned the stainless steel with soap and water, and this makes it rustproof!!!"
If anyone would like to ring them up and say "I'll have one, but don't heat treat it. I love paramagnetic stainless steel!" then can you tell me what their response was?