Loyalty is "Rationalized Stupidity" - If you're going to leave..leave.
There is only one person, you should be loyal to. "You".
Your boss or workplace could be the nicest. Friendliest (Guy/Gal) on the planet. When push comes to shove. It's you who goes over the cliff first..not the boss. If you're unhappy and took those steps, don't look back. If your work satisfaction is based on misplaced "Loyalty"..go work for the Apple Genius Bar, and drink the Purple Koolaid. Maybe you should pick up a copy of Ayn Rand also!. Doesn't mean you have to be a jerk. But welcome to 2012.