Well it certainly is possible the new bearing was faulty out of the box. I'm sure some brands are more likely to be faulty when new than others, but it can happen to any of course. I won't use bearings other than Timken or OEM if I can avoid it. I suggest jacking it up and spending some time troubleshooting, at least that's what I have to do.
I often spend a couple hours on multiple days trying to figure out an issue. This scenario is what taught me that turning wrenches is fairly easy from a mental perspective, it's the experience to diagnose/troubleshoot quickly and accurately that separates a DIY mechanic like me from a truly good mechanic.
To test the IWE you can jack up the wheel and pull a vacuum on the IWE. Then rotate the tire and see if the axle spins or any sound aside from a very light brake drag. You can pick up a vacuum pump fairly cheap or rent one from Advance Auto Parts. You can also start the engine to pull a vacuum, but it's so noisy it's hard to hear the bearing, IWE, axle etc...
