Worked for me. Was able to match my DL Diamond to Hilton Diamond. I'm traditionally a Marriott person (and hoping for a Marriott promo early in the year like past years) so it's unlikely I'll meet the requirements to maintain Diamond (though I do maintain Hilton Gold through the AmEx Plat) as I'll still primarily be directing my stays to Marriott properties but if I end up a Hilton property sometime in the window I have status because a Marriott property isn't meeting per diem or isn't convenient, the additional perks and points will be welcome.