I must admit that I've always found the chorus licks in AG confusing - still do - because the sound may be more like Don's, but Glenn's solo continues straight from the last lick in the second chorus. That's why I'm more inclined to believe that Glenn played those licks on the record. But of course it's possible that Glenn joined Don on the last lick and started his solo from there.

I must say one thing here...Glenn's solo in Already Gone might be my least favorite Eagles guitar solo from him. It's sometimes too on-the-beat for me and some of the licks aren't very...imaginative. But all the same, it irritates me when people on YouTube "educate" others, telling them that Glenn learned Don's solo because Don couldn't make it.