actually I don't know how and when I learnt to read but I've heard it was very early, when I was around 3 years old. since I remember I always read a lot and always I read mostly books (I don't consider reading magazines and newspapers a real reading) when I was 10-13 during summer holidays I used to visit the library every 1-2 days as that's how long it took me to finnish a book. And I remember I was in the first grade when I read "Anne of Green Gables" so I'd say it's possible to read Harry Potter by 6-year-old these days, probably I'd have read it as well 20 years ago ;)
to be honest I have no idea how kids learn to read here but I assume most of them to do at pre-school and in the first grade so when they are 5-7 y.o.
Last year I started doing lists of all the books I read (and movies I watch) and last year I ended up with 58 books (if I remember correctly) which I think it's pretty good for me and my crazy lifestyle ;) However this year will be worse with around 40 books I guess (now I'm around 35). But considering an average person in Poland reads less than 1 book per year I'm exceptionally good ;) I just can't imagine a day without a book, I read each day in bed, before going to sleep (even if that means only 1 or 2 pages) and whenever I'm in the bus/train/tram, unfortunately it doesn't happen very often that I read besides these situations...

I don't feel like I could ask for any Christmas cards as most probably I won't be able to send any but if you really want to I think you have my Warsaw address ;)