yes. it does, and it is. if you wanted a router just like every other commodity router, you shouldn’t have bought an omnia.
why? what is it you think you’re going to gain? the omnia is powerful enough to handle all the “background” tasks and still route your data. shutting extra services down isn’t going to suddenly double your throughput.
that’s certainly your prerogative, but what do you think you’ll gain by doing so? the omnia was built to support openwrt from the ground up, not have it shoehorned in and not as well supported by a company that would much rather you run their crippled stock firmware.
the omnia is a powerful home/soho router for power users who know and understand what they want in a home router product (but don’t feel like shelling out the money for a cisco/juniper/etc). it isn’t some cheap linksys/netgear/belkin junk.