I have never seen someone call someone else a slacker on this forum. In general, people are very positive and encouraging. If people are feeling like slackers for saving only 20% instead of 30%, then the solution is not to compare them to other people. Life is not a comparison of one person against another. If a person is doing what he should with what he has, then there is no need to feel inadequate.
There are many threads on saving to meet your goals. The goal is not to save as much as possible. If 10% gets you to your goal, then great. I think people read too much into these threads. That is why I suggest people take responsibility for improving their own lives instead of trying to validate themselves by comparing themselves to the bottom of some group.
Just this evening I saw a thread here (http://www.bogleheads.org/forum/viewtop ... st=1912817
) where the OP was saving 25-30% of his/her income, which was going to be more than sufficient for the OP's needs. One user said
This assumes you want to work until you are 65. If you want to retire early or pursue a lower income job later in life you need to save more. Spending over 50% of your after tax salary seems reckless to me, but it's the american way.
When asked if it was a typo the person replied:
I meant 50%, but that includes payment of principal on mortgages.
Though the word "slacker" is not used, "reckless" is not far off from the same sentiment in this context. Though this is not necessarily the norm for Boglehead posters, I've seen many other comments elsewhere on this forum that give off a similar vibe.
I agree with you that people shouldn't compare themselves in order to validate themselves. But inevitably, that's what most people end up doing (perhaps not to validate themselves, but they still compare). It's one of the reasons I like to visit these forums. If I'm going to be influenced in one direction or another, I'd rather be veering towards a way that's more focused on saving, investing, and using money wisely. Because the vast majority of the other influences are to spend more, keep up with the Joneses, live for today because you only live once, etc. Yet I also don't see the harm in making the vast majority of visitors to this forum feel a bit better about themselves even if they don't have the stats of the people who like to post their own so frequently.