As it says on the tin, for people who have lost a considerable amount of weight or those who are in the progress and have dropped a few to where you notice it.

But i'm interested in knowing this point.

Have people treated you differently since losing weight?

Unfortunately yes. I havent lost a "significant" amount of weight, but on my frame is looks like I did, and ppl do treat me different, it's mostly positive though.. so it kind of keeps me motivated.

I have found that people are much nicer to me even though I am still a larger person. It's like they feel my heaviness isn't catchy anymore or something.

That 'catching' thing cracks me up. It gets me space on the bus/metro seats though! I might even miss it.