I have being doing a bit more internet searching, an expat living in Turkey’s son arrived in Turkey on the 11th June and was given a new style visa stamp at Dalaman, it says the following:-
180 gun icinde 90 gun gecerli muteaddit giris visesidir. Turkiye sinirlarindan ilk giriste sure baslar. calisma hakki vermez
multiple entry visa valid for an intended stay of no more than 90 days per period 180 days. duration begins on the date of entry to turkey. holder has no right to work.
Now there is some confusion to what this exactly means and people have different thoughts.
1 - You can enter as many times over a 180 day period but you cannot stay in total for more that 90 days in that 180 day period. Great for holiday makers who go two or three times over the 6 month holiday season, bad for people who want to stay for more that 3 months.
2 – After you have stayed for the 90 days in total you cannot re-enter Turkey until the 180 day period has expired, this is to force ex-pats to purchase a residency visa which are very expensive rather than doing the Greek run to renew their Visa’s
3 – Some believes they have just run out of the correct stamps and are issuing another as a temporary measure.
So I don’t know whether what you heard is true or just a rumour / scare mongering, I think we will have to wait and see.