Re: "They all still think that the attacks have poor grammar and spelling"
It depends on who the target is. If it's a matter on inveigling someone into sending money to qualify for a payment then, yes, they want to filter out those who'll sus it out and not waste their time on them. But for someone wanting to gain a foothold in a corporate network they have to look corporate themselves. They want someone who'll be fooled by good grammar and spelling.