Like i stated days ago, it's quite possible that this is an orchestrated attack, and not "stress test" , and it's being done by same people that are pumping litecoin beyond any reason.
The idea is probably to make bitcoin as slow as it can get with all the spam, to promote litecoin's faster block time, and it's immunity to this current attack.
They are spending money, but they will make it worth their while in the upcoming dump, which will probably happen at the same time when they stop spamming the blockchain.
@op, bitcoin as it is today, couldn't process 1% of global adoption,and if situations like this one continue to happen, there is no future for bitcoin, that's for sure.
cheers
I'd like to see Litecoin banned completely off this forum.