That is no change from the previous edition. In my opinion folk are mis-interpreting the words so that it becomes a matter of 'life and death' to whack in the reversers the moment the mainwheels grease the tarmac. As far as I am concerned, it means do not delay un-necessarily - unless of course you are landing on a flooded or icy limiting runway or you need every ounce of reverse stopping force available. On 99/100 landings it makes little difference. (You could probably actually multiply that fraction by a few factors of 10!).
I had one 'keen' trainer tell me I was not selecting reverse 'quickly enough' on an 8000' dry runway with autobrake 2. We disagreed.
The 'older' 737 drivers will recall that the limitation on reverse deployment with the nosewheel off the ground used to be to protect the buckets. I think even that changed in my time on the 200 to 'not before de-rotating'.