I have been unable to find a consistent answer.
DS2 was assessed at level 1b for writing for over a year. His CT said that this was because most of the time output was either nothing or around 2 short sentences and he needed to write more. On exceptional occasions he would write up to five sentences (ie working in the library, or with constant prompts).
He has now been assessed at level 2c but his written output has not increased.
How is this possible?