They added a bunch of provinces without considering that they doubled its development. This was during the dark times when Paradox was just going around the world, waving magic wands, and adding mission trees, provinces, and development in order to sell 'Immersion Packs'. Their intention wasn't to correct misconceptions or anything of the sort (and if you find evidence to the contrary, let me know but I won't be waiting expectantly) -- their intention was to sell a crappy DLC, and to do so they decided to Make Ireland and Britain Great Again in the new RULE BRITANNIA IMMERSION PACK -- BUY NOW ONLY $10.
When you include the largest and most important city in the world at the time (Rome) and the center of a watershed moment in history (Florence) in a peninsula with a population over 15x Ireland's and at the forefront of technology, trade, culture, and pretty much the center of the world at the time then yeah, that 163 dev is certainly double Ireland's. My original definition was excluding those cities because they warp the numbers, but you'll have to take my word on that (hence why I mentioned Perugia since it doesn't have such cities). You could use Lucca as an example too maybe, but I didn't.
And those sites aren't comparing Ireland to anything. They're just saying 'Ireland has a rich history' or chronicling events. It also was impoverished compared to pretty much everywhere else in Europe at the time, which was the statement that I made and none of your top Google results say anything to the contrary from what I see.
A quick set of excerpts since you're having a hard time accepting that Ireland wasn't in fact just misunderstood:
Economy and Society from 1500 to 1690At the beginning of the sixteenth century there existed in Ireland separate Gaelic and English political and cultural communities that, taken together, formed something approaching the modern notion of a collective economy and society in Ireland. Source for...
www.encyclopedia.com
Again, I am not intent on bashing Ireland. I used it as an example where Paradox screwed up and added tons of dev to a region when they added a bunch of provinces. Their intent was not to correct a misrepresentation of the region -- their intent was to sell a DLC.
Stop with the hypernationalism too. It's largely what caused the whole mess with provinces being added to begin with.