Warriors coach Sean said: "Leinster are the best in the league. We started well and showed some guts. We took our foot off the gas at points but it was a great win.
"Our players don't like losing. This is our ground and it's difficult for teams to come here and win. Tonight was an outstanding performance and fantastic for us. It was a really good team performance," he added.
Lineen added: "That result has given us a bank to get our show back on the road. We've got four games to go and we said we wanted great things from our final five matches. That started tonight. Don't underestimate how hard that was to win that game."