No, a vaginal birth didn't make intercourse particularly more comfortable for me, at least not in the specifically physical way you're asking about. No worse, no better. Dh did notice that I was looser after our eldest was born.
However in the long run I think the whole experience helped me lighten up and enjoy sex quite a bit, in a way I hadn't enjoyed it before.
My vagina being examined and poked and prodded repeatedly throughout pregnancy was just the start. Being on the table with feet up, private parts under a bright light does something to a person. Or me, anyway.
Then labor and delivery with strangers attending, allowing the L and D nurse to stick her fingers up my vagina periodically throughout the day, holding my knees up to my shoulders for everyone to see, I just had to get over my intense self-consciousness.
And to add humiliation on top of an already intensely self-conscious situation, there was the pooping while pushing that no one warned me about.
That took a long time to recover from.
Regardless, this all led to better sex!
I'd been forced to get comfortable with my sexuality and my reproductive system, I finally felt like a grown woman, and I was able to allow Dh 'in' in a way I hadn't before. There was a lot more to this metamorphosis than this, but suffice it to say, per the title of this thread, Yes, sex was better after birth than it was before birth.
Off to read the rest of the responses.