No, I don't have statistics to prove this, but it's been the case throughout my 30+ year life living in various places throughout the US. The only time there's typically a longer men's room line in my life is at tech gathering, and it's usually still not the kind of wait where people give up, as often happens to women I know.
First, you wouldn't have gone to a NKOTB (New Kids on the Block) concert if you weren't going with your daughter. You didn't actively want to be there. The author of the article was going to a programming conference of her own will.
Second, I don't think that NKOTB are important enough that it matters what the gender composition of their audiences are. Programming, on the other hand, is very important, and will only get more important in the future. Such a huge gender imbalance at the most important PL conference will be problematic for women in the future (and for men as well, if you can believe it).
Third, you "doubt" that there was a similar reaction at the PL conference. I presume you weren't actually there, then? I wasn't there either, so I wouldn't even begin to think about making up random suppositions and using them to support my argument.
The issue is something like this. Most people have a tough time realizing that 99% of the times their net condition on any day is result of their own doing.
You see the problem manifest here.
1. Notice non equal participation of women.
2. Blame men.
3. Shift the onus of change on men not women.
4. Wash your hands off the situation, and claim high moral high ground.
Now notice what women did when there was a non equal participation of men. They treat it as it is supposed to be. Which is that men didn't take the initiative to be there and hence laughter.The first step to change the world is basically start by changing oneself first. Now if you do all this and still get limited by the environment around you, then you can start by blaming the other things.
But even before starting, trying and doing something. You have 100 people to blame you are not likely to see any improvement soon.