As a current developer for a health IT company, much of this is true. Even with the current incentives to go electronic, many doctors just simply prefer paper charts and are willing to forgo the $40k a year just to keep things the status quo. My particular company is growing by leaps and bounds because we started with a very simple Practice Management model and grew out from there whereas I see a lot of startups try to jump directly into EMR's which can be a tough market to crack.
But for anyone looking to get into Health IT, I highly recommend it. Healthcare is a multi-billion dollar industry that is in dire need of some disruption and the programming challenges are both interesting and rewarding (shameless plug: we're hiring).