I can't really answer the question you asked since your link is pretty much my primary source of information on Kepler 10b, but I did find one bit interesting. They say the planet is approximately the same size as Earth, but 4.4 times as dense (and Earth is the densest planet in our Solar System)! It probably has something to do with the lighter elements being burned/boiled off by the planets close proximity to its star, but more importantly it lets me bring up an interesting piece of food for thought that is rarely relevant!
We really lucked out with Earth's density. It's high enough that we're able to hold on to a significant atmosphere (among other things), but low enough that we're able to achieve escape velocity using only chemical energy. If we lived on a planet that was 4 times as dense, we'd obviously have evolved different physically, but even if we had evolved similarly intellectually, our path to space would have been VERY different. Imagine if the only way we could reach orbit was by riding atomic blasts, how different the progression of human civilization would have been. Likewise, imagine a planet that existed at an even happier medium, dense enough to hold an atmosphere but rare (that is, the opposite of dense, not the opposite of common) enough to cut the cost of spaceflight into fractions...
maybe not often relevant or useful, but still fun to think about!