Except that those aren't entirely true and leave out what processors actually have the ability. It's not just a straight P3 and P4 cut. Also that leaves out the entire AMD line. So the best bet is to check the previous wiki link (can't believe I just made that statement) on what your processor supports.
The problem with this thinking is that while it is true that it is not a completely straightforward cut, the people that know that already know which build they need. Also, mentioning the AMD line is largely irrelevant because the AMD market share is very small and largely enthusiast (i.e. most people that have AMD processors know exactly what they have because they have specifically purchased them - there are not really all that many OEM AMD machines out there). Also, we AMD users (I have been exclusively AMD since the AMD K6) tend to know very well which Intel chip our parts match up to as just about every system requirement spec for software only lists Intel processors. It is generally only games released within the last couple of years that mention AMD at all (good fallout from the short-but-sweet period when AMD was eating Intel's lunch performance-wise).
In short, the way I have it noted may not be * 100% completely accurate and inclusive * but it would take care of just about anyone who would ask that question to begin with. If they want more info (most non-techies don't really care for the details anyway), they can use their search engine of choice to research it.
I am in no way trying to belittle your response, but you are looking at this thing from the top down, not the bottom up. Joe User just wants to know which build is the one he is supposed to be downloading while following the instructions on the page. Only us geek/nerd types (and some * few * curious individulas) care anything at all about the underlying technology that makes each build different.
This is one of the hardest lessons I have had to learn doing my job in Verizon FiOS tech support. . .
