I must admit I had no similar problems with any of the above universities. I made a policy, however, of applying on paper with all of my attachments in one package where possible.
I have also observed that most of these schools tend to send clear admission applicants their offers and refrain from sending people who are borderline or possible rejects. I received most of my offers within weeks of applying and funding offers shortly thereafter, but my best friend (who didn't do as well as me during law school) still hasn't received anything from many of the schools. I assume most wait to hear back from an initial pool and then when they gage the rejection/deposit level, they then send another round of offers.
I would personally refrain from 'trashing' a certain school's admissions processes, as I observe from your comments that you have never been involved in one personally. I think many of you simply don't realise the level of effort and forethought that goes into dealing with several hundred or even thousands of applications. Yes you are eager for a response, but they are also eager to maximise the opportunities for the greatest posssible pool of applicants. By 'rolling' the admissions process, they have the capacity to fill places that aren't taken and also to make their heavy workloads more spread out, thus allowing the relevant boards to pay your application more attention.
I feel I must also note that Columbia, UCLA, Cornell, Yale etc have all been more than helpful when I have been respectful and realistic about their commitments.