How aid is calculated depends solely on the school. This is something you'd need to look up with each respective school.
I assume the quoted poster is referring solely to institutional grants or loans: Stafford, GradPlus, and Perkins* loans are governed by federal statute, and eligibility will not vary from one school to the next.
Ultimately, you will remain eligible for the maximum amount of federal loan funding in unsubsidized Stafford and GradPlus loans regardless of your financial or marital status. In the federal program, only Perkins loans and that portion of Stafford loans which are subsidized are impacted by financial need.
Without knowing more about the financial status of you or your spouse, it is impossible to determine how your eligibility for Perkins loans and subsidized Stafford loans will be affected. If, for example, your spouse is also a student, then you may benefit from your marital status in the context of financial aid. On the other hand, if your spouse earns a high income, your eligibility may be compromised.
*Perkins loans are administered by individual schools, and while eligibility will not vary, schools may not allocate the limited amount of Perkins funding available in the same manner.