The statement would seem to indicate that they discount g-forces as having been a factor in any possible cognitive impairment, but goes no further than that.
The defence in the trial, as reported by the BBC, did not claim g-forces as the possible cause, instead mooting cerebral hypoxia.
Whether that was considered and also discounted by the AAIB will no doubt be covered in the supplement to their report.
https://www.bbc.co.uk/news/uk-england-sussex-47324182