Very nice question and observation from you as regards the ecstasy ;D surrounding receipt of PER. As you rightly said, it's a step forward (hence, it's good news kind of). So I wouldn't blame anyone celebrating such. Some people get their files returned upon receipt by CIC, while few get NER even after being charged. Hence for the fact that not everyone gets PER, I think it's a thing of joy while hoping for the next positive stage. Besides, once you have your PER, you are almost 70-80% sure of getting PR.
Congrats to all the PERers.. ;D
while also wishing goodluck to those that are yet to receive. 8)