They've also created a very popular 'urban-esque' area by the Irvine Spectrum, where numerous automotive HQs are, Amazon has a large presence, all within walking distance of a huge number of mid rise apartments.
>I fail to see why we would hail Irvine as a great city
It's one of the most popular places right now to move to. It may not be your preference, but it seems it's popular enough to have prices go through the roof.