The lower turnout estimate (4 million vs. 5 million in the GE) and the higher age among mail requesters would back up such a result.
I guess Rs are likely to win by 0-5 points.
The only reason why I wouldn't be so sure about Rs wining here is cause the electorate so far is 33% black and is voting at the same % as whites. I also don't think Eday voting will be that bad for Dems compared to the Midwest and the rest of the country
It seems Blacks are voting big in the early days now ... but it's just 1 million votes now.
Once it's 4 million in the end, the electorate will resemble the GE electorate much more closely than now.