O'Neill hailed his entire side as "magnificent", but reserved special praise for Lafferty, who has scored a goal in each of Northern Ireland's first three qualifiers to put them in such a promising position.
He told Sky Sports News: "I'm delighted. It's a nice thing to have as statistics (won the first three qualifiers for the first time). The workrate of the team and belief - I thought tonight every player was magnificent.
"[Kyle] Lafferty has been fantastic in the three qualifiers. His physical size, technique and pace - when he puts that together and he's playing against international defenders, they can't handle him."
Northern Ireland travel to second-placed Romania for their final qualifier of 2014 in November.