I obviously don't have hard numbers on this but I can say from my own experience we purchased macs exclusively to build iOS apps for clients. We run a pretty le

I obviously don't have hard numbers on this but I can say from my own experience we purchased macs exclusively to build iOS apps for clients. We run a pretty lean shop so we viewed buying macs just for web dev a luxury item. We spent the money early-on on bigger monitors and beefy PCs for less than getting some MB Pros. However with iOS apps being something clients now want, we had to spend the money and of course buy the devices to test. The money spent upfront certainly wasn't trivial. But I admit we could be the anomaly; maybe we were the last shop on earth still coding on PCs. :)