Didn't know about lightning network. When was sending today my GRS, it took around 25 minutes. They were in pending almost immediately and then I was waiting around 20-30 munutes - not really the best result of transaction speed.
Exchange like bittex needs 20 confirmation when withdrawing it takes time for that.
GRS is almost instant I have tested myself the wallet is so fast and very well coded my friends were amazed seeing the speed