Don't forget that GPAs and DAT scores aren't the whole thing. Like some of the others are saying, DAT scores could be improved. The average on the DAT is 18, so a 19 isn't very far above.
The GPA is good, but what is the math/science GPA? Schools will value that above the normal GPA. Also, he applied to SO MANY SCHOOLS! In my experience, dental schools really respect applicants who want to go to THEIR school and be involved in THEIR program. Dental schools do get to see what other schools you have applied for. I'm sure it doesn't look good when you apply for 20, they can probably tell you're trying to get in anywhere rather than a school you really want to go to. Not only will it save your friend some money, but he should pick programs that he is really interested in. And then he should write about it.
The personal statement is an important piece. It really makes the person real and not just a bunch of numbers. Same with the letters of rec. Choose the right people. Find someone with good writing skills and tell them personal information that will help them write a better letter. If your friend has any hand skills (playing guitar, piano, sculpting, etc) it okay to have a professor mention that too.
Does your friend have any shadowing experience? If not, get some. If not a lot, get some more! Shadow a bunch of different specialties! Dental schools want to know that you are really interested in the field of dentistry rather than just sat in a dental chair once and thought it was cool (not saying your friend doesn't have shadowing experience, but if they don't they should get some). This is also a good thing to write about in the personal statement, if they feel like it.
If your friend is looking into schools that value community and public health, your friend should pick up some volunteer hours. I would say only ramp up the volunteer hours if the schools he is applying to value that though, otherwise time is probably better spent increasing GPA and DAT scores.
As you can see, there are a lot of factors that go into a school's decision. A "well-rounded" person is what they like to see.
That being said, you're a med student, so you know all this already. Dunno why you're asking us... in fact, dunno why your friend didn't post to ask. Or maybe he did, but it just seems kind of weird that he has someone else asking for him. But best of luck. Maybe 2011 will be his year