FPS + Time.time not accurate on iPhone5

Hi,

I'm fighting with Time.time on iPhone5... I'm displaying the time with the following code:

 function Udapte(){
     timecount = Time.time - startTime;
     min = (timecount/60f); // Get the minutes
     sec = (timecount % 60f); // Get the seconds
     fraction = ((timecount * 100) %100);
     GUI.Box (Rect (10,10,110,50), String.Format(Time.time + '') );
 }

However, it goes slower than the real time when I compare it on my watch. I thus decided to monitor the framerate with the following code (from the wiki), as it seems that Time.time is framerate dependant.

 function Update()
 {
     timeleft -= Time.deltaTime;
     accum += Time.timeScale/Time.deltaTime;
     ++frames;
  
     // Interval ended - update GUI text and start new interval
     if( timeleft <= 0.0 )
     {
           displayFPS = accum/frames;
         timeleft = updateInterval;
         accum = 0.0;
         frames = 0;
     }
 }

No matter what I do, I ALWAYS get 50 fps on my iPhone 5, and it's never changing. On my iPad mini however it's variating around 50. But on iPhone 5 it seems like stuck to 50. It works also fine in the editor, meaning that the fps is variating between 59 and 60. I tried to change VSync, but no matter the value (0,1,2) it stays at 50 fps :/

What should I change to have the real time in seconds displayed and not a time which is slower than the real one) and the right FPS? The timescale is at 1, and it's not changing in game...