I can speak for my 4th grade 10 yr old (not identified gifted) ADHD combo type kiddo. He started Quilivant xr at start of 3rd. His tics and anxiety went away after starting meds and he went from a B-C student to all A's and is representing his grade at the Science Olympics this year. No formal testing as of yet but SAT 10 scores went up from low to middle average stanines to stanine 8-9's and solid 99% in reading area.
He has much higher self esteem and confidence in himself.