fibre/ADSL cable maximum connection is A LOT higher than wireless,.. plus Maxis and all otgher wireless ISP reduce the maximum connection recently,..

once your connection MAX OUT, no matter what speed is your connection, u wont be able to do anything else,..

but on ADSL/fibre, u still can multitasking even your download IDM running full 16 connection, due to it not yet MAX OUT the connection,..