bumbleymummy - Formal learning vs play based, is all about the difference in choice. In high quality play based settings, there will be literacy areas and writing tools throughout the place, so children can sit and write if they want, throughout the day, in a variety of ways. Adults will help extend their interests as far as they want to take them, then when the child looses interest, they can just choose to go do something else. Because it is child led.
In a formal setting, it's more structured. The teacher decides what you learn about & when. So if you are not interested in it at that moment, it is tough luck.
When you think about the skills required to sit still, listen, concentrate, follow instructions, then put them into practice, all within a group for extended periods of time, many young children (under 5) just aren't ready yet.
For some it can lead to a negative association with the teacher/school/subject, because they just weren't developmentally ready to be doing that yet. Given a bit of time, and the opportunity to develop their language/physical capability/social skill/ understanding a little more in a low pressure (play based) environment they may have had a different experience, and therefore develop the required skills, just maybe at a slightly later time.
Does it really matter if you mastered reading by age 8 or age 9, as long as you have learnt? Surely it should also be important that you develop a love of reading, so that you want to do more of it, so you are constantly learning throughout your life.
If you are put off because it was forced on you before you are ready, or you were made to feel stupid, because you couldn't understand like the other children, the system is failing you.