[colarris (OP)]

 
 Does the brain of a highly intelligent person look any different to one belonging to some like me with a rather low intelligence? Would it look any different if dissected and examined?

[Pwee]

See the results of the examination of Albert Einstein's brain

[SammySchwartz]

According to me all human beings brain are same but the capacity of working all brains are different.

[Jessica H]

There is some interesting research on brain size and intelligence: 
http://www.ncbi.nlm.nih.gov/bookshelf/br.fcgi?book=neurosci&part=A1833&rendertype=box&id=A1833

You would be more likely to find a size difference in a certain area of the brain than an allover size difference.  As you can see from the link from the previous post, Einstein had a average sized brain, but a region that would have helped in mathematical thinking was larger than average.