Really? Apogee is the only manufacturer in this market I can think of, out of many, that supports Apple products but not Windows. All latency-fearing Windows audio software and hardware uses ASIO, for which there is broad industry support.
> Audio hardware manufacturers want to release products for platforms that people are actually using, so they target OS X.
I think you perceive their motivations correctly, but most people would reach a different conclusion than you have. Anecdotal evidence suggests that said manufacturers have as well.
> The really weird thing is that I get better latency when recording through my iPad then I do when recording through my beefy gaming rig.
The latency of a digital audio system is determined by the amount of buffering in the signal path, but your computer must be able to keep those buffers reliably full. Your iPad, being a more controlled system with fewer background processes, should be able to do a much better job of this than your desktop box, where anything goes.