If you go to Public Mobile's website and select "Plans" you are greeted by this text:
"Create Your Plan
Looking for $40/month talk, text and 2G of data? Click here and check out our 90 day plan."
From comments I've seen on message boards and articles, this confuses some people. With the promo last November, the text was the same except that it said "4G of data" which some people misread as "4G data" and took to mean Public Mobile only offered HSPA+ as that's sometimes (incorrectly) referred to as 4G. Some carriers, such as Chatr, offer you 3G-only data in exchange for price reductions, so some people are looking for a data 'catch' as to why Public Mobile is cheaper and misread that as 2G data, instead of 2GB of data. By changing "2G" to "2GB" it would clear up any potential confusion, and all it would take is adding a single character. Well, two if you rendered it grammatically correct by adding a space between them (ie. "2 GB"). 🙂
Fear of slower data speeds than other Bellus brands seems to be the number one reason people on the outside looking in don't choose Public.