I don't think you understand how bad foreigners are at this game. HOTS has a greater skill ceiling so lesser players, namely foreigners, are getting shit stomped by Koreans. Not even just Korean Terrans.
List of Foreigner vs KR:
Life (z) vs Minigun (p) 3-0
Last (t) vs Stephano (z) 3-0
Mvp (t) vs Feast (p) 3-1
Taeja (t) vs SaSe (p) 3-1
Bomber (t) vs Goswser (z) 3-1
Flash (t) vs Bly (z) 3-1
Parting (p) vs State (p) 3-0
Innovation (t) vs Huk (p) 3-0
Leenock (z) vs BabyK (p) 3-0
Last (t) vs d.Killer (z) 3-0
Flash (t) vs Ret (z) 3-0
Parting (p) vs Sen (z) 3-1
I actually just noticed a ton of Terrans probably got through because they had foreigner walk-overs
And if you think the skill difference between Polt and Life is small you are absolutely and completely insane.