And none taken, rmichael...I understand as well as any professional the undeniable convenience of latex coatings and the development and advances of latex formulas in the past 20 years, makes it an easy call...and in many cases (such as new construction where vapor barrier technology and venting has also come of age) it's the appropriate material.
My business concerns predominately repaints of older homes, 30 years and more. Many of these don't have benefit of effective vapor barriers in kitchen and bath areas, nor do they employ "green" sheetrock, either by neglect of the drywall installer or the misinformed DIY homeowner...Yes, the primer is the main warrior against moisture in these cases, and though I have used Gripper (ICI is my main supplier), I've not yet been convinced of it's superiority over a product that has a proven track record over many, many years.
...Also, as advanced as acrylic latex technology has become, there are still pitfalls, especially where moisture is concerned. I have seen all too often how the acrylic resins will "bleed" down the walls in a high humidity situation where the acrylic is not allowed to cure properly.
No, a lot of advancement has not been made in alkyds recently, and for a couple of very good reasons; Oils and alkyds have been around for a very long time, there is not much improvement left to be made other than Mooreguard style "alkyd reinforced acrylics", and the EPA has seen fit to regulate a lot of very effective and durable materials out of existance in most states, the alternatives NOT better, only safer to lab rats in California...
It boils down to preferance and environment. I have no doubt that in the original poster's situation that acrylics will do fine, but I assess each situation by a rigid criteria that focuses on short-term and long-term results in a high moisture environment. Easily two-thirds of the bath areas I paint nowadays (in Minnesota) are still done in oils...
Sorry to give you the idea that I'm being argumentative, it's not my intent...