I am not really familiar with HotS, there are new units which I guess really change how the game was meant to be compared to WoL, but between Protoss and terran, I thought Terran are better than turtling?

last time I play a bit WoL before, Terran had Siege Tank and a couple of anti air, it is not penetrable 

Sounds terran to me, he like micro, ambushes, obs thingy like toss, turtling,
Micro = t benefit the most compare other races, no say other races no need micro but t dps benefit more from micro
small ambushes = t army alwiz famous for 1 drop maximum dmg, compare to z n toss as their army r not doing well in small skirmishes
Obs thingy = eventhough he cant 24/7 scout , t can alwiz scan
turtling = cmon, mech turtle...u seriously wanna engage that? We alwiz wanna caught mech out of position not engage into fortify siege line, watch panzer king aka goody
My opinion mayb wrong since i not high lvl player aka master/gm, choose ur best race if u hav try all 3 races.. i dun random but i do play a race a season to know get used/race suit me
have fun laddering ranked~

Sry if many typo, i use phone to surf temporary, my asus still in factory

is there such thing as turtle until a big army, then do a single push and win the game? this kind of win rate is higher than the one like zerg, always push and harass? or?