I've been doing CP for more than a year regularly. I've usually had a decent judgment with respect to the rating a problem might be given, once I've solved it. But for a couple of months now, it feels like something has changed. I seem to be predicting the problems to be harder by more than 200-300 rating points. In virtual contests, I noticed how a lot more people are solving seemingly hard problems quickly. Is this just me or have others noticed this too? I've noticed a lot of blogs about plagiarism lately, has it been driving the rating of problems down? Have people been discussing solutions in live contests? Or am I just tripping?

For example, I was legitimately surprised to see more than 13k people solving questions on Diophantine equations — I Hate 1111