maxxpower,
Considering the millions of primers made every year, it's a wonder they are as reliable as they are. When you pay the premium price for match primers, you're paying for the extra experience of the people who make them, and the extra inspection. That may translate into a slightly better chance of avoiding a misfire, but in the long run, proper primer seating and handling goes farther in that regard.
As to better accuracy expectations, I've never noticed any difference. I'm not by any means a world class shooter, but I consider myself an above average shooter, if ribbons and trophies are any indication.
Hope this helps.
Fred