Are these autos stunted?

Good afternoon! I would say they are not stunted, but they do look a little hungry. Photos 1 and 3 might just be the flash of the camera but if they are actually showing a little chlorosis (the pale green that they appear)this would usually point to a nutrient deficiency, most commonly Nitrogen or Sulfur or a PH imbalance. To start I would recommend checking the PH of your nutrient solution prior to feeding and catch the run off that drips out and test that as well. These girls are pretty forgiving in a range of 5.0-7.0 but thrive in the 6-6.5 range. If the PH is within range for each of the tests then you can go ahead and step up the nutrient level until the color returns. As far as the height this strain is described as “Sturdy” especially with autos which is usually used to describe shorter bushy plants. Your Seedbank describes Fast Berry as “ During the early stages of growth she stays low, with short internodal spacing and thick, fingered Indica fan leaves. She will stretch and grow with one main central cola, and an abundance of side branches” So just be patient and around the 6 week mark enjoy the rapid vegetative growth! Good luck and happy growing😎