The attackers used p2sh addresses that had easily guessable scriptSigs (they lacked a signature altogether to redeem).
I ended up liquidating about ~1.2BCH of their funds just now in 3k tx's. Each tx has 133 inputs at about 15 sigops each. There is a sigop limit per block of 20,000.
So you will see the mempool now has lots of tx's and is 18MB full as of the time of this writing. These tx's are all the special tx's that have a lot of sigops that I made to liquidate (take) the attacker's funds.
It should clear in 2 days.
Your normal non-sigops abusing tx's will not be affected and will confirm way before mine!
I am the only one waiting in line. :)
But damn.. it felt good to hit the attackers back.
Here is a sample tx taking $0.23 at a time.. for a total of ~$500 :):