Peps are relatively fragile...I just assumed it would be harsh to freeze them. Plus I've never heard your method, anywhere.
I wouldn't freeze all peptides but some are fine, hcg is ok as well as mt2, i'd be weary of freezing igf-1 but Palumbo said years ago that it was actually a good option. I would never freeze regular hgh (just in case, since it ain't cheap). This isn't "my method" it's pretty old actually and if you search around other boards you'll come across this very fast.