rate of H-1B audits at universities
This is known as the "Administrative Site Visit and Verification Program" (USCIS site link) and it's not a response to the Trump administration; the site was last updated on 2014. Not every H1B applicant will be visited. So, chance is you'll find more "never heard of it" than "oh yeah."

And I highly doubt if there has been an increase in rate of visits in the last two weeks since the new presidency; this kind of measures seems too much of a finesse compared to what had been passed down from the executives.