DC1 (15) - would have picked up books to “read” any time from about a year old. Was properly reading short novels by 3.5 and hasn’t stopped since. Gets through more books than we can keep up with - wpm count is much higher than average. Has definitely read less in more recent years due to having a phone to scroll through, but still reads far more than most 15 year old boys and gets really excited about new novels.
DC2 (13) - would have looked at books as a toddler but definitely never as interested as DC1 - despite exactly the same book input from me. Was properly reading short novels confidently and independently by about 6 but wouldn’t have done it by choice until closer to 9. At 13 now - will read by choice and often gets enthusiastic about books, but would rarely read for more than an hour at a time and definitely is my least “keen” reader.
DC3 (10) - would have rarely looked at books as a toddler. Was independently and confidently reading short novels by about 7 but wouldn’t have done it by choice until about 8 1/2. Now at 10 will choose to read every day and according to school’s AR system has read the most of anyone in their year group. (by a significant amount)
DC4 (10) - would have looked at books as a toddler but struggled more with actually reading. Would have liked to do it more but found it harder and wouldn’t have done it by choice until about 9. Now at 10 will choose to read but not as much as twin. However, as per above, according to school‘s AR system is a close second to DC3 for amount of books/words read this school year.
I am an avid reader, but DH wouldn’t have picked up a book by choice until the last few years. We always had a huge number of books in our house. All DC raised the same way.
I definitely think DTs were less interested in books because they found reading harder, so it wasn’t such an enjoyable/relaxing experience for them. It’s also a personality thing though - DC3 is a real introvert, so now that they are confident in reading, it has become a real joy and escape. DC2 & 4 are definitely more extroverted and just don’t like to sit still so much. Even if they are still they would rather be DOING something like art or a game, than simply reading.