I knew this would happen when I found out the Tiger was coming to RO. I have seen similar posts on the Steam forums: "OMG the Tiger sucks!!!" Welcome to real world performance.
The reason that the Tiger's turret is so slow is because it had to be manually hand-cranked most of the time.
There was a motor provided, but unless the tank's main engine was running at high RPM, it didn't have the power to move the thing adequately. I remember reading somewhere the gunner had to rotate the handwheel something like 400 revolutions to swing the turret through 360 degrees.
This is why I love ROOST so much. Even though the armored portion of the game still has room for improvement, it is the only game I know of (other than Combat Mission:Barbarossa to Berlin) that actually lets a player get a feeling for how vulnerable a lot of the German AFVs were, instead of making them into these God-like, invincible machines.
The IS-2 on the other hand, has more armor, with far better sloping, rounded turret with next to no shot traps, faster turret traverse, lower silouhette, less ground pressure, higher power to weight ratio, and was easier to maintain mechanically than the Tiger. So much for Arayan superiority
Of course slow reloading, and the gun performance was less than would be expected of a weapon of that caliber, but it makes less difference when you outnumber the enemy, are faster and more maneuverable, and have better armor.
Similar thing happens in forums for simulation games like IL-2. People in there constanly are making posts with titles like "why does the 109 suck so bad! It was the best fighter of teh war!#@?"
Or those that thought just because the P-51 was good at 25,000 feet than in game it needed to also outperform all other aircraft on the deck, or that it's 6 .50s should kill tanks and saw ships in half