********, I work for the largest online retailer in the entire world and we are hiring all of our people at 40+ (Lots of over time).
Unless you can provide any evidence. However, considering I am registering and training the employees that we are bringing in, I am going to say that you're just guessing or maybe have a specific example. Broad sweeping generalizations are bogus though, and your statement is a lie.
ETA: Which just goes to show that it's not the ACA causing people to decrease their hours, it's the employers that are more concerned about their bottom line. I am lucky enough where I work for a company that doesn't engage in such stupid and childish behavior. It must be a real bitch to work for a company that acts like that. My wife, also, runs a tech support desk for McDonalds nationwide. They also are hiring people at full 40 hour weeks. In fact, I can't think of a place off the top of my head that ISN'T hiring at full time, at least in my area.