The culture can turn on a dime, as soon as management decides the place has become big enough and needs to Get Serious about managing its IT resources. This might be triggered by the theft of a laptop, or an online break-in, or a virus outbreak or something of the sort, or adoption of some productivity-sucking acronym-fest like ITAR or ISO-9000, or the sale of the company, a merger, or a joint venture.
I've witnessed that sad process unfold at two companies-- first management has its epiphany, then it brings in some consultants or sets up an IT department, and then the die is cast, with the parasitic "pros" finding ever more ways to feather their own beds.
Just, be vigilant, be prepared, be smart... and enjoy the small-company culture while it lasts.
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A yellow tinge has been noted in various generations of iDevices; maybe something similar can happen with laptops. It fades with time and IIRC has something to do with an adhesive curing, which takes a few weeks.
Dunno if that's at the root of your experience, but it's a maybe.
For me the only issue with the rMBP display was the dreaded image retention, which developed after 9 months or so. Apple replaced the (LG) display with a Samsung display, and it's great... though I'm annoyed to have to say anything nice about that scummy company. Their component manufacturing arm does a good job, gotta admit.