No, there aren't.
Since the 90's the policy has been Cubans who reach U.S. soil are granted refuge under the "wet feet, dry feet policy". If their feet touch dry ground, they're granted asylum ... so, unless these hundreds of thousands are living in the surf off of Miami, they don't exist
Oh brother, where to begin:
1. As tx-eggman pointed out, Cubans are not "illegal" except in exceptional circumstances.
2. Cubans are now a minority of the Hispanic population in Florida.
3. Many, if not most Cubans, are in white collar professions. This is especially true of second generation Cuban Americans.
4. Most of the "illegals", per ICE, that you tend to encounter in Florida are from Guatemala, Haiti, or Mexico.
But hey "anyone with the last name Suarez is the same" and ignorance is bliss!