"I find that while the above is technically true, I have almost NO Irish and am over 90% English..."

The Ulster Plantation was a mixture of Scottish and English settlers so I imagine that some English did blend in to the Ulster Scots/Scotch Irish community. Let's face it some of the English came from northern England too and there would have been no significant difference between them and their Scottish counterparts north of the border. The Scots and English settlers would have probably have been closer to each other than either community was to the Catholic Irish. The big bulk of the Scots settlers were from southern Scotland that is Ayrshire, Galloway, Renfrewshire, Lanarkshire, Dumfriesshire and the Scottish Borders. I think the point is they weren't actually Irish. At least not initially. There would have been some intermarrying of course but I suppose it depends on how long they were there as to how Irish they became. The biggest numbers moved from Scotland to Ulster in the 1690s. according to professor Devine more moved in that decade than the rest of the 17thC put together. How long would they be there before some moved on to the States. A generation, not even for some I imagine, or perhaps several generations for a few.