From looking at the dwarf cleric sheet: I can only say: Yeah, who would ever want humans to be competitve to the ubermensch races +1 to three (probably even forced to be the lowest three) totally makes up for darkvision and an extra hp every level. Three cheers for the humans .... or not
Remember, the dwarf is also getting a +1 to two stats. So if the human is getting +1 to an additional 3 ability scores that is 5 total. Getting +1 to the lowest 5 is, I think, looking more likely.