Time and Genesis

In the Interpreter's Bible on Genesis (v. 1 1952 ed.) page 1:5

"There can be no question but that by Day the author meant just what we mean--the time required for one revolution of the earth on its axis. Had he meant an aeon he would certainly, in view of his fondness for great numbers, have stated the number of millenniums each period embraced. While this might have made his account of creation less irreconcilable with modern science, it would have have involved a lessening of God's greatness, one sign of which was his power to do so much in one day."

I thought of this quote when I read John's post on 'time' and its implications for our understanding of God and his acts.