I'm not a fan of the term "hothoused." If your daughter wasn't able to learn the math- she wouldn't have learned it, in spite of your best efforts.
I remember getting some negative feedback when I taught my son to read at age four. I could tell he was ready to read and just needed some mechanical instruction. He's in first grade now, and an advanced reader both in terms of mechanics and comprehension. Most importantly, he likes to read and appreciates having skills to read whatever captures his interest.
I would also say (warning, soapbox) that advanced math skills are going to be a differentiator in the 21st century. Given the somewhat dismal performance of US public school students in math- you are preparing your daughter by advancing those math skills.
