In Arban, page 10, it say that to correctly play these you must play the quaver as a semiquaver, this is what I used to do when younger. However these days I tend to play them with a full length quaver. I find that playing them like this has the benefit of them not being rushed and they're far easier to play too. Also I think they sound better and arguably it is the correct way to read too because if the composer had meant for it to be a semiquaver instead of a quaver then he/she should have written so or put a staccato dot in it. I've found that the long quaver seems to be the norm in the better bands these days. Some would maybe describe this style as orchestral?!? Your thoughts please.