Choppy said:
I think what the original poster has identified is essentially a competition problem. With a limited number of graduate positions available it's always the top candidates who get the spots, and having a publication or two as an undergrad certainly increases your competativeness.
What I *don't* want to see is physics turn into something like MBA's. The good news about physics is that if you have the basic preparation, there are enough spots so that you can get into physics grad school somewhere. The problem with MBA's is that there are very few spots in the top schools, so you end up with horrendous competition.
At some point internships, research and publications because just a means to get into graduate school and win a prize rather than something worth doing for its own sake. The problem is that if your main focus is to get the committee to like you, you may not end up doing that good research.
Personally, I think that a big problem is the "winner take all" ethos that society has gotten itself in to.
So what about a student who comes up with some great, publishable ideas during a senior thesis project, develops the tools for implementing them, but runs out of time to see them to fruition before graduating?
Or what about someone like me that didn't do undergraduate research in astrophysics but did a project designing education software. This really did hurt me getting into grad school, but it helped me a lot once I got out.
This is also a problem not just with undergraduate research, but with tenure track faculty. The problem is that if you are on a deadline, then you aren't going to do any "high risk, high reward" research. You are going to focus on safe, stable things that give you predictable results, and not work on really crazy stuff that probably won't work, but can change the world if it does.
And then you pull in the "research bias" that graduate schools have. If people get into grad school for undergraduate research, but not for tutoring, then guess what people are going to do.
This is why weight is still placed on reference letters and personal statements.
And this is why the statement of purpose is so crucial. A committee simply cannot see from the rest of an application what a student did. You got a publication, so what did you do? Or maybe you didn't get a publication but you still did good work. You can use your statement of purpose to explain what you did.