Well, I think I can go along with that!
Among other things it states "Two-thirds of the top-ranked holiday songs of all time were written between 1941 and 1958. You have Bing Crosby, Irving Berlin and baby boomers to thank for that"
And look at the list. If Bing did not introduce some of them, the chances are he still sang them and contributed to their popularity. (11 out of the 12 to ranked).