I think the difference of naming is indicative of a shift in Japanese culture. Public displays of affection are fast becoming more acceptable; women are growing out of their (relatively) more traditional roles; etc. If you ask some older Japanese (probably the same ones who the old farts on this site have been associating with--HA!), they'll probably tell you that their country's going to hell.
There are several opinions as to just why this is happening. Personally, I think it has to do with an economic paradigm shift. Specifically, that the Japanese economy is moving further and further from the aggriculture-based economy of its history, and more towards a commercially dominated one. This may sound counter-intuitive, as Japan is one of the largest commercial economies in the world, but farmers are the single biggest political powerhouse in Japan. Where in hell am I going with this? Well, as a traditionalist-based country, traditional Japanese values ruled. But as the nation moves further away from its traditional base, more liberal social standards become prevalent.
Of course, it COULD just be all the freaky anime twisting their minds.