If you have simple data, why use something as complicated as JSON? For a recent project, I had a simple CSV file with an int and float per row; using JSON would probably double the datasize. I used a simple string.split(",") for the javascript decoder, because I control the data, and know it's safe. I don't need another javascript library (I'd probably do differently if I had a standard library, not a hodge-podge of scripts).

Sometimes, simplicity is better for everyone.