Very sad to hear this. She did have a long and quietly spectacular career. So many excellent performances. May she rest in peace.
She gave what may have been the funniest performance I've ever seen. This was in "The Defenseless Creature" scene in Neil Simon's The Good Doctor. And she was so brilliant in Jules Feiffer's Grown Ups.
There is a rather surprising error in the Broadwayworld piece. It was Madeleine Sherwood, not Sternhagen, who played the Daughter in the original production of Albee's All Over.