Leaving aside the numbers (if it's many people or not), what it's important is also de number of years of displacement... Look at some 10-15 years periods... Most of the people counted as IDPs are still living in camps (if not, they probably changed "main" status -see my comment on being economic migrant, IDP, etc. at the same time-).

Remember Palestinian camps, people that was born in camps... A very worrying scenario...

Regarding Turkey, it's one of those areas with specially controverted figures. Here we are talking of Kurds.

I copy from IDMC webpage the information on the last "displacement danger" situation that they undeline there, in 2007:

"Turkey's internally displaced people (IDPs) face uncertain prospects as a recent upsurge in violence in the south-eastern provinces threatens to undermine the positive impact of major human rights reforms which have been adopted since Turkey became a candidate for EU membership in 1999. Clashes between the Turkish army and Kurdish militants have raised fears of a return to the high levels of violence that led to the internal displacement of about one million people, most of them Kurds, at the height of the conflict in Turkey's south-east in the 1980s and 1990s. The government declared "security zones" in pockets of the south-east in June 2007 and the Turkish armed forces have talked of the need for an incursion into northern Iraq to tackle Kurdish rebels amid mounting tensions on the Turkey-Iraq border.

However, in the last three years, the government has made strides to address the internal displacement situation. It has undertaken a national survey on the number and conditions of IDPs; drafted a national IDP strategy; adopted a law on compensation for property damages; and put together a comprehensive pilot plan of action for IDPs at the provincial level. The long-awaited results of the government-commissioned national IDP survey were released in December 2006, confirming that the number of IDPs in Turkey is significantly higher than the previous government estimate of 355,807."

In fact, it was around a million...

"The government funded a survey conducted by Hacettepe University, which is aimed at documenting the situation of IDPs from a qualitative perspective as well as providing insight through quantitative research on the estimated numbers of displaced. The findings of the survey were publicly released on 7 December 2006, and estimate that 953,680- 1,201,200 people were displaced by conflict in the south east between 1986-2005."

"If you don't want a man unhappy politically, don't give him two sides to a question to worry him; give him one. Better yet, give him none." (Fahrenheit 451)