Lender credit commonality in new construction.

[Joseph Gibbons]

I Just had 2 buyers purchase newly built homes, same family, both with impeccable credit and little to no debt.  They were swayed away from the builders financing and toward a mortgage broker. The first recieved 4k in lender credits and a 3.6 rate.  The 2nd is due for closing and is getting 3.25 but no lender credits.  

My questions are:

- Do lender credits typically lead to higher interest rates?

- How common are lender credits in mortgages for new constructions?

- Should the 2nd buyer feel slighted by not being offered the credits based on being swayed away from the builders 6k toward closing offer?