Let’s say you’ve been out of town for, oh, the last decade.
The last time you picked up Crain’s, Chicago’s economy was stung by high-tech flops from the dot-com bust. Now, though, you’re quickly sensing that there has been a shift: You learned that 13 Chicago tech companies have gone public or been acquired so far in 2012, and 17 did so last year, according to tech-community group Built in Chicago.