Looks to be so:
Funny quote from the Vanity Fair piece:
While dining at Chef Melba's in Hermosa Beach, California, Armstrong heard an obnoxious voice, with a thick New Jersey accent, coming from the table behind him: "Hey, kid, what are you gonna do for work this summa?!" Armstrong worried that he had a kook on his hands. "I'm talkin' to you, kid. What are you gonna do?" Armstrong got pissed, he recalled. "I was like ... I think this motherfucker's talkin' to me. So I wheeled around in my chair. It was fucking Don Rickles. And I started laughing.
