Twitter has confirmed that as per their planned schedule they have removed the cap on retweet_count field on tweet objects.
This means that you would now be able to see the actual number of retweets on popular tweets.
Until now, Twitter hid the actual value for tweets that got more than 100 retweets.
Instead of having a string representation take the place of an integer when the retweet_count exceeds 100, the count will reflect the actual number of times the tweet was retweeted as an integer. With the exception of the occasional cached tweet object, the “100+” string value will become an artifact of the past.