My comment comes from experience of being in progress of doing an Honors CS - Honors Math double major. After having completed Honors Calculus I/ II, Honors Linear Algebra Imy /II circuits in my first year I felt about 2-3 years ahead in my knowledge of mathematics and associated rigor -- this was especially evident when I was taking combined CS/EE courses and seeing student struggle with concepts that I thought were basic (infinimums, supremums, etc.) but apparently are not covered over the course of 2 years in the regular streams.