I think the data from almost all of the ether studies is extremely suspect because of the methodology.
1) They chose to bypass the stomach and deliver straight into the small intestine.
2) They used 5 times as much sesame oil as the ethergels use.
3) They also infused the intestine with bile -- there is a study showing that bile is absolutely necessary for lymphatic uptake, when it was not present, there was almost no uptake.
4) The studies did not use a THP ether, they used a methoxycyclopentane ether.
5) Given # 1 -- Is there evidence to suggest that that the ether does not undergo acid hydrolysis in the stomach??
Then, even all of this aside, something Bill said makes me question the THP technology even more.
Lymphatic absorption is thought to be do to super-lipophilicity of the drug. Bill mentioned that the THP ether is only soluble at 50mg/ml -- this is NOT spectacularly lipophilic.
A decanoate ESTER, for example, can get 300mg/ml, an undecanoate ester is pretty much infinitely soluble -- it and the oil can pretty much dissolve in each other.
Yet, the undecanoate esters, which HAVE actually been tested in numerous studies, through true ORAL administration, are extremely mediocre (I have seen bioavailablity form less than 1% to as high as about 6%) -- this is not much different than the base androgen.
So, either 1) the Super-lipophilicity theory is wrong (and keep in mind it comes from the same researches who did the studies that people are getting there data from, and it IS the accepted theory), 2) the THP ether provides significantly less of an increase in lipophilicity than the methoxycyclopentane ether (the one from the studies), or 3) ethers, like esters, are pretty much worthless.
Either of the last two would take the 41% estimations from highly suspect to utterly absurd. And, the first one still requires a very good explanation as to why it would be superior to an ester (which sucks).
So, basically, I think Bill did pretty well with what the data gave him, but the data just does not give much at all when you get into real world usage.