in the present day bitcoin transaction is slow.but if u are comparing that with credit card transaction it is too slow ..it may take some while to cope up with the same transaction speed with that of bitcoin .well i can assure that in the near future people will transact through bitcoins and it will be same as the bitcoin transaction and convinient too ..kudoos 
Sometimes, Bitcoin transactions are slow but there are times that bitcoin transaction in my experience was fat. fast for wallet to wallet, and it depends on wallet you are using i think,
It doesn't depend on your wallet.