Obviously the Democrats are slipping something into their medications.
More seriously, this is an obvious conclusion to anyone who hasn't bought into the far right mythology. If you do something for people, people like it. This isn't rocket science. Every objective measure I have seen, suggests that the law is working as planned.
Some in the GOP tried hard to sell the idea that health insurance is somehow bad for you. People didn't believe them and went out and bought a product they are happy with.
Add that to the recent evidence that Medicare spending has slowed and things start to look up even more.
None of this is likely to penetrate the wall of delusion on the right, but for the rest of us, it is good news.