This is something else I've been saying for a long time...engine wear doesn't really take place all that much at start up. Unless you start your car once a year, there will always be a layer of oil on every component. How much oil do you guys think you need? 2-3k rpm on an engine w/o a load isn't a big deal. Remember, the Aunt Millie test...
I agree, it's most from poor maintenance. Please don't add misinformation here like saying that 15-50 is too thick, etc. We have not seen this at all. We have only seen thinner oils breaking down and causing engine disasters such as the Toyota issue.
Otherwise, it's correct, the filter size is not an issue because all filters should be full when starting the engine ensuring immediate oil pressure. In fact, a larger oil filter should provide additional filtration, a good true.
I will say though, that the number of cold starts has an effect on the life of an oil and may increase it's contamination relative to a car that does a lot of highway travel. Again, a maintenance issue.