Cai Renxiang reached the first realm at six years old. She is a Ducal Scion with the best resources, planning, and help anyone could get. She's currently at Threshold, the same stage as Xia Lin and half a stage above Ling Qi. Bai Meizhen is considered an exceptionally high Talented Ducal and she reach Green just months before we did. Gu Yanmei is supposed to be a genius and she wasn't anywhere close to this.She could just as well have started earlier-same effect, but even in our age she is not as talented as we are, since assuming she started at 10, she is cultivating 6 years, while we have 2(she probably is older still).
Let's not just compare Xia Lin to Ling Qi, I don't mind people being stronger than us, but we've pretty clearly been said to be at the same Talent as some of the highest nobles of the Empire and if Yrs just threw out an equal to them every time he needed someone who we could respect then that would lose all meaning. If we get two members of Viscount and Count clans, both at precisely the same age and a once in a few decades Talents, then was either an astronomically small chance or it cheapens the value of the Ducal's supposedly insane cultivation.