The fit between goalie and team plays a role in how long that feeling-out period lasts. According to goalies who have been through it, there are several possible factors. Some are easier to spot and quantify.
The number of shots and chances a team surrenders off the rush versus during end-zone play is one of the more obvious factors. Every goaltender in the NHL can defend each, but some prefer to play with a little more flow or backward skating in their game and may adjust more readily to an increase in rush chances. Others aren't as comfortable with extra movement and prefer a more passive, inside-out approach better suited to end-zone play.
"It's an adjustment," Minnesota Wild goaltender Devan Dubnyk said before the 2017 deadline. "You play it a little differently, you are maybe not as far out or further out, but it's not easy."
Few goalies like odd-man rushes, but some handle them more easily than others because of their skill set.
The same can be said for a decreased workload.
Although fewer shots should, in theory, make life easier for a goalie, the reality is that some struggle when they are not busy enough.
In general, goalies with more movement and backward flow in their game tend to rely a little more on rhythm and timing and are better suited to regular starts and more shots when they do play.
"Some guys excel more when they are constantly facing 35-plus shots and have that rhythm," said Winnipeg Jets goalie Steve Mason, who had immediate success after being traded from the Columbus Blue Jackets to the Philadelphia Flyers before the deadline five years ago.