I'm sure it has to meet some sort of industry standards, so it should be fine. In the past I've read that filters have a "sweet spot", where they accumulate enough debri that they actually filter better. And the opposite is true for the early stages of filter life - when they are new and there isn't anything but the filter media in there. Watched a YouTube video on a horsepower comparison between a stock new OE filter, a K and N new filter, and an aftermarket stock filter. I believe the they also tested a used OE filter with 30,000 miles on it.
If I remember the after market new stock air filter allowed for the most horsepower increase, flowed by the K and N, then the new stock OE and finally the used air filter. Their thought process/conclusion was that the K and N and the aftermarket new filter probably did the least "filtering" and therefore let in more air that was able to generate more horsepower. They didn't keep the test running through the life of the filter...I imagine everything leveled off once enough debris was captured in those filters. And I have read studies in the past on K and N filters...how they let sand and abrasives past the filter because of the size of the filter. Either way it appears that things eventually level off.