Although to be fair sometimes it did take longer before February, I remember waiting for 2 months for my non priority one, and then once I landed here it started only taking a week or two for non priority. I was super salty about it 
Yes, it has done - in the summer months it's standard for priority to take up to 4-5 weeks and non-priority 3-5 months, and over Christmas as well it can take a bit longer.
However, in previous years, the much longer processing times only started around May/June and were over by late September, with a slight peak around Christmas... so that was about 4-5 months of longer processing times.
This year, the long processing times started in late February and were still going in November, and they're still relatively long now (i.e. people are still waiting up to 4 weeks for priority). That's about 9-10 months of backlogs so far... which we've never seen before (not in the last 11 years anyway).