I'd disagree with the Xeon bit, I have a 6 year old Sandy Bridge quad core, and Android Studio runs butter smooth.

I'll confess to the 16GB of RAM and an SSD though. Although honestly an SSD now days is required for anything to be usable.

Android Studio is amazingly performant though, the Emulator is great, ignoring bugs and glitches and the occasional times it just stops working until I flip enough settings back and forth that it starts working again.

Of course a huge benefit is that I don't need Apple hardware to develop for Android.

I've had no problems using Android Studio on my Mac with 8GB. On a side note, the Android emulator even started faster than the iOS simulator. I also found it odd that the Android Emulator seemed to consume less resources than the iOS simulator which was taking up about 2GB of RAM.

Edit: Also, how does Xcode compare in performance? It seems lighter, but I only have a pretty recent Macbook Pro to test on (which also handles Android Studio just fine)