It's not about how much or little you can blur...
In my first link, if you scroll to the bottom of the page, there is the quickest way to get good skin retouch. And if you check the video clip, you'll find that she uses that technique. And if you do a batch out of it, you can do it faster than 10 seconds with 10 times better result. If you don't know how to create a batch, search the Photoshop help.
But if you want it to look unprofessional, then go ahead. Maybe the client's love getting all blurred out.
When you're pretty new to retouching, you think it looks awesome. But after a few months when you go back to look at those old retouches you find them looking like crap. I've been there so I know.
RMThompson: Even if you are satisfied with your skin smoothing, you need to fix a few things. You have blurred the nostrils and eyebrows too. Make sure only the skin is blurred, nothing else. You know the best retouch is when it's hard to tell that it's been retouched.
And about that fashion shots are over processed - it's just a look. But blurry skin isn't a look, it's just lack of retouching experience. It takes practice, just like everything else.