No, because it is marked "SUPPLEMENTAL", and GoogleGuy tells us that those are pages which are old and not crawled frequently. We know it exists; the damned engine tells us so.
Your "sandbox" index doesn't exist. Please, please, please show me that I'm wrong and you're right. I'll kiss you.
But it's generally not a good thing to invent something from thin air, then to ask everyone to disprove that you've invented it from thin air. There's no other defense other than "You've made it up, pass the pipe"