This is immensely tiresome. Cook said that it would last of day WITH INTENSE USE. Intense use is way way more than your few message.
BTW, he was talking of both watches, the smaller watch has about 35% less volume than the bigger one. Seeing as part of the smaller watches volume is occupied by non battery item, there's a good chance that the bigger watch would have 50-100% more battery life than the small one.
So, if you buy the big one, which is smaller than the other competing watches, by Cooks own admission, you'd get at least 1.5 days of intense use (and possibly more).
So, Hey, by your own standard of use, the larger Apple watch would last well into the third day (probably lasting the whole day).
I didn't write the article. And I never said anything about the Apple watch and battery life other than to address the fact that more than 1 solid day is possible.