An educated answer I'd put forward after reading works that analyze the state of religion and ethnicity in the early Ottomans/Ghazi states is that simply put, "Turks" were looked down upon; as in they were an inferior title associated with those not yet muslim. Hence, albeit there might have been, and has been attempts by these states to muslimize their lands (interesting enough early missionary work was done by sufi mystics), there were not attempt to Turkify. Unfortunately, the book "Uyur idik Uyardilar" by Irene Melikoff is in Turkish, I'd reccomend it otherwise.

It is important to note that these early Sufi/Bektasi/Alevi mystics who converted the people of anatolia, also Turkified the population.

Now, of course, this is all before the notion of ethnicity was clear in peoples minds, things would change with the Young Turks regime.

Seeing as how religion > ethnicity in the Ottoman empire, their implementation of the Millet system, whereby ethno-religious groups were given rather autonomous positions under their Millet-basi also goes to demonstrate Ottoman unconcern with "Turkifying", this fact is compounded by the fact that there was no "millet" for the Turkish ethnicity, but all muslims were put under one umbrella, and the muslim courts were held in higher esteem than the dhimmi ones (once again, showing muslim > non-muslim, not turk > non-turk).

Another interesting fact is that not only were Turks more numerous in the Balkans, being driven out, with an oft ignored genocide, with the collapse of the Empire, but quiet a lot of these were religious dissenters who were exiled (in the Balkans) or in the case of North Africa, descendants of soldiers or settlers (example; Tunisia alone is rumored to have 20% of their population with Turkish ancestry), so its not like Turks of the Ottoman empire were concentrated only in Anatolia.

For the genocide/ethnic cleansing of Turks and muslims in the Balkans, Justin Mcharthy's works seem to be a good place to start, albeit his criticizers have labelled him a bit too-Turkish.

All in all, its really hard to sum up the history of the evolution of the turkish identity in anatolia/balkans with a rudimentary post like this, so I do apologize if my answers do seem a little vague. The take away point is that, for the Ottoman Empire, until the Young Turks, being muslim was more important than being Turk.

Note; BTW, I'm an Alevi Zaza, the only reason we escaped sunnification and turkification was that after the Battle of Chaldiran, where eastern anatolia came under Ottoman Control (from the Safavids) is that we (the Alevi) fled to the mountains. Just another answer for you. Also, thank goodness for the failure of turkification on that account :D