No mate ! i am telling you from my first hand experience. What i did on the S3 and S2 was to flash custom roms all time to in order to just get a glimpse of lag free experience. I have always been an android fan boy and the will be in future as well. All of my family members have android based phones and tablets just because i urged them to do so.
I just wanted a phone which i can actually use as a phone rather then flashing roms and kernels all the time. And this Iphone has served me quite well now for the past few weeks. Its not even jail broken as well
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Also Modern combat 3 lagged quite a bit on S3 , and it amazingly smooth on the Iphone. I`ll be switching to an iphone 5 pretty soon as well 