true vs. "true"

true is allowed in json. Is there a reason to use "true" instead of true?
## Request:

https://demo.buddycloud.org/api/notification_settings?type=email
## Response:

``` json
[
{
target: "asdf@asdf.com",
postAfterMe: "true",
postMentionedMe: "true",
postOnMyChannel: "true",
postOnSubscribedChannel: "false",
followMyChannel: "true",
followRequest: "true"
}
]
```
