by Hector San MiguelSlot machines at Delta Downs have generated more than $32 million in gross revenue in less than three months, according to financial records released by the Louisiana Gaming Control Board.The Vinton racetrack, owned by Boyd Gaming, had 1,394 slot machines and 100 video poker machines. From Feb. 13 through April 30, they generated $32.23 million in gross revenue. Records show that 471,081 patrons entered the facility.For the month of April, the Delta Downs slots parlor had the second-highest win -- $75 per patron -- statewide. Its competition was 14 riverboat casinos, and only one -- Horseshoe Casino in Bossier City -- had a higher win at $76 per patron. "Win" is the amount of money a gambler loses at a casino.Delta Downs has the only operating racetrack slots parlor in the state. Louisiana Downs and Evangeline Downs are both working to get their racinos built and operating.Under state law, the track has to give up 15% of gross revenue from slots to supplement purses. The machines have generated $4.8 million in purse money for Delta Downs from February through April.The Louisiana Thoroughbred Breeders' Association gets 2% of the gross revenue. It has collected $644,760 from Delta Downs. The Louisiana Quarter Horse Breeders' Association gets 1%, which has amounted to $322,380.