I think James made a good point when he said that different people's results will vary with different plants. Water parameters, substrate, actual CO2 levels, actual PAR values... all of these will vary from tank to tank, even under the "same low wattage."
Personally, I've never had problems keeping Vals in low lighting. Stems like Bacopa carolinina, Najas (several different species), and several Hygros also do well. Stargrass does OK, just I have to really be careful how I keep it trimmed to avoid shading. I'm about to try every Crypt species I can get my hands on to see how they do for me. C. wendtiis I know do fine.
Seeing as it's pretty common goal for someone setting up a low light tank to not have to trim too frequently, IMO slow plant growth is a good thing. I don't mind if my Lotus isn't as brilliant red as my neighbors or if it stays nice and short- I kinda like it that way. My personal plant "standards" are - 1) does it stay alive 2) does it look nice. I'm not that picky, I guess.
I think James' list is a great starting point. People just need to keep in mind that planted tanks are always trial and error- the plant that does great in one tank may or may not in the next (or even in the same tank just in a different spot...
) That's one of the joys and frustrations in working with plants, period- terrestrial or aquatic.