One way to look at Donor-Advised Funds is that you've irrevocably donated that money, and you can't use it for your own retirement or similar savings, so it doesn't seem to make sense to include it. But if you didn't donate the money now and were planning on doing so anyway, you would have probably donated appreciated assets, which would have been considered part of the asset allocation.
Another way to look at it is that the Donor-Advised Fund money sits in an investment pool that can grow to cover your charitable endeavors. Do you grant more from your fund because it grew? Or do you grant a fixed dollar amount? Or do you grant a percentage of your overall assets?
You could also look at it from the tax deduction side of things. Do you donate less because the fund has more value? Or donate a fixed dollar amount? Or donate a percentage of your assets or income?