I used to think most people who say "xxx hours still no Gjallahorn" were spending all their time dancing in the tower and doing patrols, and I think a lot are like that (not that extreme), but I tend to check author profile when people post about it, and I do see a lot of people with 3000+ grimoire and three 34s posting about it. I think Xur should routinely sell it for 80 strange coins or so.