Found one useful link related to graphics acceleration in Symbian devices.
Just to my surprise came to know that Nokia 6630 was the first device to have 3D API’s. That is one more first apart from the megapixel camera it sports.
Also got one more link which details the CPU information of the leading smartphones.
Apart from the core the iPhone is a beast in terms of RAM. So comparison with low resourced Symbian devices is a bit unfair.