Yesterday I decided to analize the top 5 first page listings in my state, and to my suprise the majority ( 4 out of 5) had their booking settings to only 6 months? so I decided to change my booking listing setting to 6 months, and yes a 6 month booking setting will improve your position in search ranking.
I am not sure why it improves it, because you would think that a long term booking window would be preffered in the algorithm, I guess it might have to do with percentages and averages of days open to number of booked days. It would be great to have some feedback on this, let us know how it worked for you.
( I noticed the change in my search ranking after 24hours)
Rubén