People used to obsess about that, trying to figure out steppings, which location (Malaysia or Costa Rica) it came from, etc. Used to make a difference with some CPUs in the past, but doesn't seem as big a deal these days. Enthusiasts have gone on to bigger and better things to obsess over, such as why their SSD underperforms the same one in a review by 5%, or why their online buddies are able to overclock their same GPUs to 875MHz but they are only able to get 840MHz, or why their CPU runs at 57°C while some random online person reports 55°C and it bothers them so much they tell everyone in forums that they are about to cry.
Names have been changed to protect the innocent as well as the guilty.