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It is beyond question horrible advice to jump-start with 100% of your investable assets all hitting the market on Day 1, for curtains. Anyone who says otherwise is an idiot.
No rational [or professional] investor does this. Essentially, you are saying that, using SPX as an example, it is OPTIMAL to put 100% of your funds in on Day 1. It will never go down more than a tiny bit, the optimal solution is all of it, now.
After all, the SPX has underperformed bonds for 8 years now.
Since we know the market will have a tumble of that size, it is more optimal to invest some/most now and the rest later.
Or DCA over 3, 6, etc months, whichever you prefer.
You seem to lack a basic understanding on these issues you are giving advice on.
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This is wrong. Dollar cost averaging is the suck.
You can google around for numerous articles about this.
Here's a particularly good one:
http://www.rmi.gsu.edu/FSR/abstracts/Vol2_1/v2-1a4.pdf