I think it's really hard to say. You're in a different stage in life before children and it's maybe difficult to compare apples to oranges. My dh and I are both much more organised and on top of household tasks having children than we were in our more carefree childless days. We have to be. We also have busy professional lives and other real life responsibilities that we didn't have back then (when we were basically both still students).
I've pretty much always done the cooking because I like to. I'm a better cook and I find it relaxing usually and it's just something that's my 'thing' that I take responsibility for and I always have, even when we were dating. I don't really let my dh cook often, though he probably cooks for us about once every 2 weeks when I'm able to relinquish a bit of control. In terms of household tasks, like meal planning, food shopping, cleaning, washing up, DIY, organising, etc. he is definitely much more on top of it now than before kids, but so am I. He was like 21 when we first started dating and I don't think he'd ever cleaned in his life. But that's probably the case for most 21 year old students. We're now in our 30s with kids and he runs his own business and we have busy careers. It's just different. But yes, I would say in addition to just the general life changes that come with getting older and more responsible and needing to be more efficient when you're busy working full-time plus some, having kids really requires someone to be really on top of the household. Now of course, that can be just one of you if the other parent refuses to take responsibility for those things. But definitely for us, we've grown into it together and both carry more weight that we used to.
That said, you get what you put up with. I'd never put up with my dh not sharing the household tasks. He has things he has to get done just like I do and we both do our things. I do the cooking and he does the washing up twice a day. I do my laundry and usually the kids (because I'm pickier about it, though he usually folds it and puts it away after), but I've never done his. He wants clean clothes, he has to wash them himself. He does the bins, I do the food shopping, he does all the DIY, and I do homework, etc. We share the school runs mostly equally depending on our work schedules. The house wouldn't function otherwise because I refuse to carry the weight of both of us and he knows that and wouldn't want to face the wrath of me being tired and stressed out from doing everything frankly!