Sorry to hear of your struggle. Now, I'd like to gingerly float a couple things your way. Doctors do not really know much about how a person feels...so it was probably more like a hopeful statement rather than an accurate forecast. You are likely going to have to go through a period of adjusting your meds till you get the exact elixer your body needs.
As far as pure t4 to Armour conversions, I beleive they can not be made with any real accuracy. Armour has a set of features that play many different roles that simply aren't comparable to Synthroid (which contains only one hormone, its an important one, but still its on its own).
Can you feel a difference in 7 to 10 days? YES....but not necessarily perfect restored metabolism. I understand you frustration when someone tells you thats what you should expect. You are on the right track though...so take heart though.
I would say that you should log your symptoms every day. See which ones dissolve...and if new ones enter over time. This will give your doc a working understanding of what you are feeling too.
In MY opinion, you can get your blood tested every two weeks or so, and add a quarter of a grain at every dose uppage. The tests should only be one peice of the puzzle....your logging work is going to be a much bigger one.
Also, it would be a good idea to eat very healthy foods, and even add some supplements. If you throw in a bit of excersize too...that might help.