Getting an occasional 7 shot group at MOA at 25 yards is doable for most with a good shooting springer, but my guess is that it is more an exception vs the rule. If trying it 5 times of more I'd guess the average group size would be closer to .35 or .40 for a very good shooting spring gun and a very good shooter and .45 or .50 would not be a bad shooting gun at all. Not saying there aren't gun/shooter combinations out there that can't do it, but consistently shooting 7 shot groups at MOA at 25 yards with a springer? Pretty rare I'd say.
I shoot 5 shot groups and try to shoot at least 5 of them before I let them "tell" me anything. My best guns will shoot about 0.35 to 0.40" at 30-35 yards in this way, fairly small standard deviation (maybe one or two MOA groups in the lot). I'm fairly happy to have them shooting 1/2" groups (again, average of many groups... not just one or two) at 35 or 40 yards in general.
I think MOA for PCP's over 25 shots (Five... 5-shot groups) and 1.5 MOA for springers is a pretty good if not very good gun... at least to 40 yards and maybe 50. Might not be Extreme bench rest worthy but it's no throw away. Testing different pellets, rests, positions and holds is critical. Calm winds will help you see the guns potential but do little for the shooter.
I recently got a poor shooting springer shooting quite well and did a lot of testing and bench shooting... different pellets, different grips and holds and bag placement. It's shooting very well now, and now I'll try to get that last little bit out of it to see if it'll shoot VERY, VERY well. This is all part of the fun.
Have fun,
John