Are Wexford peaking in February when they should be puking?

I am in Clonmel at the Coursing last Saturday morning when I met a man and his wife from Wexford. He spotted me in Wexford Park at the Cork game the previous week and we started chatting away about the match.
“Ye’re flying it at the moment,” I said to them. “But I hope the old Clarecastle theory doesn’t apply to ye now.” “What’s that?” asked the lady. “That ye aren’t peaking,” says I, “when ye should be puking.”