Yes, they are high again in Madden18.
Real NFL for 2016 had a total of 443 rushing TD's
In one Madden 18 Sim, it had 706 rushing TD's
But it does not hit you right in the face in Madden, because league leaders seem normal. Top 3 leaders have 19, 18 and 18 rushing TD's.
I really dont understand these types of things, took me 2 sims to see stuff.