I think that it is easy to romanticise the street food phenomena. New ventures are keen and hungry (ho ho), they price to sell and gain a loyal customer base. It is then all too easy for this too slip as success brings growth, more people, more outlets, standards can slip as the entrepreneur loses focus on the quality of the product. There are many people wanting to get into this growth area. Serve low cost to produce at high margin prices to comfortable middle class folks who buy into the street-food vibe. The smart ones listen to the negative messages and re-focus on the core values. Customers will quickly move on if the quality declines. I have eaten fine burgers off the old Meatwagon on a rainy evening in an industrial estate in Peckham. I managed to get into the last night of the Meateasy - the burgers were great, the mac and cheese and the fries less so. I had good burgers and Phili-steak off the new Meatwagon at The Rye. I think stick to the beef based products referably cooked on the Meatwagon. They are not cheap burgers, but I can only eat 1 of them at a sitting. So, cheap meal. The negativity could be a reflection of slipping standards, it could be that the whole enterprise was over-hyped and some less influenced folk have spotted this, it could be that some people want to have a pop at a successful enterprise (oh so British). It is probably a combination of all.