Doesn't sound like it. The bond markets will be thrown into turmoil. Remember what happened last time the us was downgraded? It'll much worse this time
Says who? The same gov't/media/economists/analysts who said similar things prior to the sequester and shutdown.
Your comparison to the last time it almost happened is not entirely comparable, this time it comes along with a government shutdown, so they would offset the cost of paying the bills/bonds due by not having to pay salaries for 800k federal employees.
Not sure the math is correct, but that's what one republican senator said.