Advise Exposure correction versus evaluative metering

[candyman]

Just recently I purchased the 5D MK III
I noticed that while using AV(did not check M or TV) in combination with Evaluative metering my photos (using 24-105 and 70-200 MK II) are about 1 stop underexposed. I do not have this with my 7D. I thought both use the same meteringsystem. Did the metering change in the 5D MK III? Or do I need return the camera for a check?
I can correct of course the exposure. Even in post-processing. I can use also a different metering but I am just surprised of different behaviour compared to my 7D. It now means that all the time using AV icw EM I have to use + 1 stop EC
 
Can someone help me with some advise and explanation? Thanks!
 
ps sorry if this subject was already addressed. Couldn't find it

[Viggo]

Highly normal. It was the same or worse with the 5d2 also. I welcomed the the new +3 to -3 scale, but at the same time I found myself using it in the same way as the scale on the 5d2, meaning it needed even more. A lot of backlit situations I used +3 stops which I never had to use before. I didn't like metering in any of them... the 1d X on the other hand is the best. I have ever tried...

[candyman]

Highly normal. It was the same or worse with the 5d2 also. I welcomed the the new +3 to -3 scale, but at the same time I found myself using it in the same way as the scale on the 5d2, meaning it needed even more. A lot of backlit situations I used +3 stops which I never had to use before. I didn't like metering in any of them... the 1d X on the other hand is the best. I have ever tried...

Thanks Viggo for your reaction. Does it mean that while using the 1D X you have a first time right? No EC tweaking?
And, would/do you avoid Evaluative Metering?