Lol theres so many things wrong on this thread that I don't even know where to start. They definitely do look at your major when considering your app and GPA. When they say they don't care about your major they mean that as long as you complete the pre reqs you can get in to dental school. But if you finished a rigorous major why wouldn't they factor that in to your app and GPA decisions. We all know they look favorably on taking a heavy course load every quarter, and that is exactly what engineering is.
As for the above post. Although a biology major may help you more in dental school, it doesn't in the application process so much. The only reason biology majors are the most accepted is because there are more of them applying than any other major. I can't find the data right now, but I remember seeing in an excel spreadsheet that the major with the highest percentage of acceptances was engineering.
In the end of the day though admissions is a numbers game. A 3.8 engineer will be better than a 3.8 bio, but a 3.7 engineer might not be.