Good deal there Smallaxe. We lucked out too. We finished aerations, dormant seedings, and winterizer fert apps late this afternoon. After today, it won't be 50 degrees -- instead....well, you can see the weather map.
I'm sure many leaf removal companies will continue - even if the ground is frozen, just to do the best they can.
I had a "prepaid" aeration today. Instead of aerating, we did a leaf removal/fall clean-up instead. The leaf cover was very heavy (some areas = 8 - 10 inches deep). Underneath, the leaves were wet & decomposing...killing the turf. Customer called yesterday asking where his aeration was, and said he was hoping to clean his leaves up soon. A few minutes ago, he called our office. He was SO HAPPY that we did the leaf removal cuz we would never had gotten to it. So it worked out.
Proud subscriber of TURF Magazine. (thanks Ron)