I think the author did not really get the motivation behind the LightTable concept. For those interested, it was this talk that inspired the guy(s): http://vimeo.com/36579366

It's about the instant feedback during development as opposed to the classic change/compile/reload cycle.

Especially for concepts it's important to understand the intention rather than picking on it point-by-point (which in itself, while true for the most part, seems rather pedantic to me).