From my previous "losing coins" experience I have a feeling that all these easily earned coins in the last 24 hours of high block reward are going to go away as quickly as they have come

There is a chance that the larger rewards are because there are less people on the new chain (and windows updates at the end of last week), I have my fingers tightly crossed...
The confirmed coins earned right now are legit coins. the problem is there is too much so value might suffer in the long run when the exchanges get flooded with sell orders. Previously you were earning too much coins because you ended up in a fork chain where you only compete with a small number of individual. This time the high reward is as a result of a rule change which was tested on a test chain for stability and not for reward payout with limited hash rates. If you can see as a result of the rule change there are also way more orphan blocks which are acceptable so do not count unconfirmed coins. I believe Joe will recalculate soon and probably adjust the settings again.
Short observation about net hash rate and actual hashrate. Pow and pos blocks are now forced at certain intervals. So try to multiply pow speed by 3-4x and thats probably the right net hash. Net hash similarly is divided into 3-4x. So the reward is being to high payout despite the high actual net hash. Not sure about this but this is just my opinion.
lets give joe time to figure it out. Whats important is the stability has been fixed. New implementations of course tend to have some unforeseen results from time to time.