I've have to disagree with the characterization that IT changes faster than healthcare. Consider just as a starting point that the two major journals in the field (the New England Journal of Medicine and the Journal of the American Medical Association) publish weekly, and if an important finding comes out in one of these journals, practitioners much change quickly or risk lawsuits. I'm thinking in particular of when the finding was published that an HIV positive pregnant mother should take AZT to greatly lower the risk that her child would also become HIV positive. Immediately after that article was published, practitioners starting using AZT prenatally.

On the other hand, in IT, technology changes, but if it's a corporately driven technology, generally there is a roadmap and announcements about the technology before it's available for use, and if it's not a corporately driven technology, interest tends to build over time, instead of immediately.