Hi everyone. I'm about to get my first ever Mac OS machine, and I'm already fixed on the 2012 MBA 13"/128GB/8GB. I'm just about ready to go buy one, but I'm concerned about the new 10.8 version that should drop in July. It would be neat if I could get Mountain Lion pre-installed on the MBA when it arrives, because I'm completely new to Mac OS and its way of doing things, and I definitely don't want to screw things up by updating Lion to Mountain Lion myself. So, my question is: if OS 10.8 will be released in July, based on past years' experience, how much time does it usually take for it to be pre-installed in all future Macbook units they sell? Does it happen real-time, like 10.8 rolls out => instantly, all future Macbooks will be sold with it? Thanks for reading, awaiting answers!