Tickless by itself doesn't guarantee that the system won't be woken up periodically by an application timer. It simply guarantees that the system won't wake up needlessly if there are no timers to serve.
Timer coalescing, which I believe Windows also implement, does help by both setting a minium resolution to timer frequency and making sure that timers wake up in batches.
EDIT: Yes: http://arstechnica.com/information-technology/2012/10/better...