What is revealed about Blanche in these chapters? Do these revelations come as a shock?

In scenes 6-8 the truth of Blanche's past is revealed. We find out that she did stay at the Flamingo, which we all could have guess was true. What we didn't know before was that she was kicked out for sleeping with multiple men. She dated so many men that eventually she was kicked out of the town as well. We also find out what happened with Blanche and her first husband. When she was young she married a boy, about the same age as her. After they married, Blanche saw him with an older woman. Later when they were dancing she whispered in his ear that he disgusts her. Soon after he ran outside, put a revolver in his mouth and fired. Stanley goes on to tell us something that we all probably knew. Blanche was kicked out of town and fired from school because she had relations with a 17 year old student of hers.