Posting this will likely kill this trend, but so far today, The team leading in offensive yards per play in the 1st half is 5-1 Against the 2nd half spread for the lines that my book offers. They only offer select 2nd half lines, so not sure how the trend looks if it's expanded.
The specific games results so far are:
Northwestern PK Win
Louisville -10 Win
Wake +14 Win
Minn +6 Win
Hou +4.5 Win
Ia St +6 Loss