When I read this article, I never knew that guys would do and take these steps seriously.
I agree with the above quote though. Better be genuine than perasan after that huhuhu

I hate to say this, there's a guy in my office doing exactly the same steps like you said, you know, only me think that he might be a playboy or something, since I saw that he did the same things with other girls in the office.

So, in my conclusion here, if a guy do the step 1-4 with a couple of girls at the same time it's consider flirting.

In my case here, it's hard to differentiate if a guy is honest with his feelings by doing those signals.