General Updating from 5.1.1 to 6.1.2 possible or worth it?

I have been chilling with 5.1.1 on my jailbroken ipod touch 4g for awhile now because I thought ios 6 would slow it down (and I was too lazy/busy to jailbreak it again), but after a bit of recent research I found that ios 6 might be faster. My Ipod has seemed like it has gotten slower and slower and I have so many cydia packages that I don't know where they all came from. I though it might be time for a restore. I have the shsh blobs for 6.0.1, 6.1, and 6.1.2, but ifaith says none of them will work. I'm almost sure the answer is no, but would there be any way to fix any of them? I really would like the unteathered jailbreak which isn't availible for 6.1.3.

I guess the ultimate question is: Would updating to ios 6 make my ipod run smoother or could I just restore with 5.1.1? I have saved all my blobs locally with tiny umbrella. I have never used shsh blobs before so any help would be apreciated.

 

For what reason? Is iOS 6 slower?

 

Ok thank you for confirming this. It was worth asking . Also, is it possible that once iOS 7 is released an unteathered jailbreak will be made that will also work for 1.6.3?

 

Ok guys, thanks for all the help. I guess I'll just do a restore and stay on 5.1.1.