This is probably true - the issue with whattomine is that it really doesnt account for price swings - it simply does it at a spot in time (ie when you query the server).
So when I query the server if eth diff is low and price is low then eth is definitely not going to be on the top of the list.
Coinwarz is better - but only because it gets proper api calls and shows the differences rather than the spot differences.

Either way, theres no telling how this fork will increase or decrease things. I'm just happy that there are some developments in the works