Not all token academy players (old system) were fast trainers. Maybe you had the impression they were fast because they were progressing fast when you trained them but you should consider that they had low quality too and that many young players will progress fast due to the fact that they are low quality in respective to the level they are on. Some of those 6-8T academy players were not fast trainers as such; I trained two of those that I sign last season this season and their progress were more like medium trainers. Despite that they were in the very low quality area (3 stars) and with low white skills, they were progressing at the speed of what a fast trainer would progress at higher quality (5 stars) and far from what a fast trainer is expected to progress at the quality they were. Those could end more like slow trainers when they will reach the low 6-stars area. The highest token value ones (12-14T) were fast trainers.