Forty minutes really isn't that bad, you just have to relax and understand this is the nature of btc. There were a number of times it took me an hour or 2. Like the others said, it is for safety reasons, but i hear that it can be safe at shorter times like some other cryptos(don't quote me on this, i have heard people argue against this too). The speed issue is one thing that worries me about some people entering the btc market and in regards to another coin/coins taking over.