Ah to wait 5 mins or not to wait 5 mins, that is the question to quote from Hamlet. Well certainly it's not a quote from Harman Technology but it is an interesting question, as would be the answers to: What's the evidence that causes Steve Anchell and maybe others to say you should wait?
You'd think that Harman would have researched what a waiting period does or at least checked that the Ilford method without waits reduced the fixer content to archival proportions. If Harman doesn't say to wait can we take it that it has concluded that waits aren't necessary? I wish I knew.
I'd would be nice to hear from Harman on this subject as it's come up at least twice in about the same number of weeks