SMU's batch is really small, so definitely the average of the top 20% would be bumped up by those who choose to go overseas. I would think that the "real" top 20% discounting outliers to be perhaps 4.5-4.7? Thats really within the realm of possibility.
I am an arts grad with a pretty useless major, projected 2.1 hons, finished
ns. Some international representation of
nus and nation, I am fielding offers at 3.7 +/-. after allowances in both private and gov. I dont think its too big a surprise for someone with a better CV and a FCH to be getting 4.5-4.7. Considering even within the government a FCH male could be hitting ~4k +/- with allowances with a good CV within ministries. What more MNCs which are fighting to hire those? They will probably offer more.