But he believes the tricky Monte conditions, where guile and clever driving counted for more than pure pace, means it cannot be used as a reliable form guide for the new-era 2017 World Rally Cars.
"We've not yet seen everyone's true potential and I'm expecting a very exciting and very close-fought Rally Sweden," he said.
The Frenchman added two more days of snow and ice testing last week to the limited time he has enjoyed in the Fiesta after only signing for the British M-Sport squad in December.
"We had a really good test. Conditions were very good, very cold with icy roads and I hope we will have the same on the rally. It was my third and fourth days in the car on snow after two days in December, so I feel much more prepared now than I was before Monte-Carlo," he told WRC Live.
"The feeling was very good but it's hard to judge the performance as everything is new. Sweden is one of the highlights of the season, the speeds on snow and ice are incredible. That means you have to be very precise with little margin for error," he added.