Quantitative easing is when the central bank buys financial products, usually bonds, in an attempt to get more money into the economy.
What the Federal Reserve did is not quantitative easing. They propped up short term money markets, the repo market (which is enormous), and the overnight loan system banks use (this is a massive important system right now) with short loans, one and three months. There are legit questions about whether or not the Fed should have done this (** raises hand **) and that is absolutely fair. But this isn't money that could have been used in other situations. As far as I can tell the Fed doesn't even have the legal right to use money in that way, though it could probably get it through congressional action.