[Thomas Bertilsson]

I did two rolls of TriX400 120 last night without a presoak. Then I came to APUG between rolls to do a bit of research on the purple tint to the negatives. I found a post that mentioned presoaking, so I tried it. That initial dump of water came out navy blue. I finished developing as normal, and those negatives came out exactly like the ones that did not have a presoak. My ignorant eye can't tell the difference, and I've now forgotten which roll was presoaked.

That's my experience also. I don't wish to make assumptions, based on my highly non-scientific observations, but I can't tell a damned bit of difference in my prints, so have written the presoak off as academic.
Esteemed people with infinitely more experience than I have made cases for and against it, and everybody is probably right to some extent. But, until I can see a difference in my prints, I really don't care. So there...