I personally do more sporadic, but larger purchases instead of smaller ones at a fixed interval, but I have never bought this type of argument, which is entirely dependent on a bottom right before a significant run.

You're as likely to catch a local top and be shown to "lose" against someone DCAing during an arbitrary period.

My point being, these "analysis" are useless and don't prove anything. You can only prove that this or that method performed better or worse against the other within a specific time frame, not in general.