I guess I mixed things up , I thought he means the solo at the very beginneing before the song starts, but that's not Joe Walsh... I just checked their pix , and I apologize for my misunderstanding.
Anyway, yes this one is a Rasgueado technique... It's a basic technique in flamenco & gipsy music.
This technique is both ascending & descending ... In this solo it's descending.
You start from the high e-string , and sweep it down till the low E-string... and you do this starting with the little finger followed by ring, middle & index.