One of the biggest differences between the example of Irish independence and slave revolts during the American War of Independence is that Ireland had a firmly established national identity with reasonable ease of communication between Irish people.

The restrictions of movement and association a typical American slave suffered would not allow them the easy communication with slaves on other plantations or in other states to sustain any sort of "nationalistic" independence movement the way the Irish were able to. Add to that that there was no single cultural identity to slaves during the American Revolution. Slaves were still being actively captured from all over Western Africa, which has an immense diversity of languages and cultures. Often Africans imprisoned together on a single slave ship couldn't effectively communicate with one another.

Rebellion by slaves in 18th-century America was more personal and localized than the nationalist rebellion by the Irish in the early 20th century.

One of the most fascinating forms of early American slave rebellion was the formation of Maroon communities, isolated communities of run-away slaves and Native Americans that grew up in the great swamps of North America where they were generally well hidden from white colonists. The Great Dismal Swamp of North Carolina/Virginia and the Everglades of Florida were two of the best-known Maroon communities in North America.

An outlet for armed rebellion presented itself in the Revolutionary War in the form of Lord Dunmore's proclamation which offered freedom to any slave who ran away to British lines and fought against the American rebels. From what I recall, the follow-through on this promise was weak at best, with many slaves falling back into bondage. A small population of former black slaves were relocated to Nova Scotia after the war, however.