Rabbit online may or may not give the accurate cards that would have played out to showdown. Depends on the site, their shuffle process and their software.
, the entire 52 card deck is set after the shuffle and remains unchanged throughout that hand. You would get an accurate rabbit in this case.
Full Tilt shuffles differently. They only select at random the number of cards required for the hole cards. After that, the software calls for cards as needed. For holdem, it would ask for 3 for the flop. In an eight seat stud game it would ask for 24 hole cards. The remaining cards are requested as needed, selected at that moment by the RNG, their algorithm and entropy requirements which can and will change that specific random request at various moments in time. Rabbitting in this case would be useless and misleading.
usually have their shuffle procedures detailed on their site information. PS and FT do. If the above doesn't make basic sense, take the time to search the web (Google works well) for details on pokerroom RNG's (true and pseudo), algorithms and entropy. An understanding of these terms is required to better understand how online poker is dealt and how true random selections are verified and protected.
If all else fails, just enjoy the game. You didn't pay to see the cards, so why worry about what 'might' have been there. That would be a new game called Pokeralmost.