Don't knock it, it's quite informative. Especially the locations different posters have seen either of them in real life. I'll have to try it myself, looking at someone in the supermarket and seeing if I can instantly guess their height based on that single brief glimpse. I'll start training for it later as I walk into Tesco's.......Instead of sorting the ladies into 'would' or 'wouldn't' it'll be "5ft4"......"5ft1"......I reckon one could soon get good at it. I wonder if they'd allow it, alongside my invisible megapenis as a superpower on my Avengers application form?