College Navigator says that a recent class at Oregon State graduated 900 engineering majors out of 5,829 bachelor’s degree graduates, or about 15% engineering, which does seem to be that “huge”. For comparison, about 12% of a recent class of UCB bachelor’s degree graduates were engineering majors. UC Merced has a significantly larger percentage of engineering majors at nearly 25%.
Oregon State does have less ethnic diversity (63% of the largest ethnic group, 13% of the next largest, probably a reflection of the state population of college age people) and a smaller percentage of Pell grant recipients (19%) than any UC with undergraduates.