Am I the only one that can't
>use my bodys reaction to foods to infer what my carb/fat/protein intake
>should be?

Maybe you are the only one, j/k.  I know that in my case I have both long 
term and short term reactions to certain macro-nutrient proportions.  If I 
have just a few carbs I get very puffy and my stomach literally looks like 
a balloon by evening.  I guess that would be a short term reaction- which 
makes it easy for me to figure out that I can't eat many carbs.  The fat-
protein part is harder.  I tried the homo optimus diet once which 
emphasizes more fat with less protein.  My skin looked amazing, but my 
strength/energy decreased.  I am still unsure about what my fat to protein 
ratio should be since the effects are more long term.

As for Mercola's test, it didn't help me very much.  I do believe he is 
right in that there are carb, mixed and protein types, but his test 
doesn't necessarily diagnose accurately.  My results said that I was a 
mixed type, but I am actually a protein type.  The fact that meat doesn't 
agree with me made the test diagnose me as 'mixed'.  I am a protein type 
but my body just happens to prefer seafoods and nuts (must be my 
Mediterranean genes).