Short answer: Yes.
Longer answer: I'm lazy. I do try to make stats for whatever the players might end up facing, but I'm bad at prioritizing and when the session starts, I might realize that a character or two don't have any stats. If it comes up, I'll wing it or use whatever stats I have lying around that seem "close enough."
As I keep reminding my players when they're crunching numbers to be the best at dodging/swordfighting/blasting stuff with magic: I adjust difficulty to them.
I "cheat" during combat by using more (or less) Fate Points to make things exciting without being over- or underpowered. I may add/remove skills/stunts/powers on the fly, so to make sure people stay on their toes. Liberal use of concessions, creative consequence and Taken Out results means that things don't get boring.
Which is the important thing.
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I think that tailoring encounters to your group is important and make a point of trying to match the challenge to the players. No Loup-Garous against the social butterfly mundane journalists* and no "High School Jock Jerk" trying to threaten
G. "Reaper" McMurderKillDeath the Dragonslayer*.
Group of "Feet in the Water" Pure Mortals with a standard "civilian" loadout of skills and stunts?
Social Conflicts: Dealing with authority figures (police officers etc.), getting people to talk.
Physical Conflicts: Twitchin' an' Shakin' Mugger, Proud Lone (Were)Wolf.
Mental Conflicts: Mental impressions (Sight, Soulgaze, Psychometry etc.), torture.
Group of ~12 Refresh killing machines (like my current group)?
Social Conflicts: Fairy Kings, Red Court Nobles, Fairy Merchants, White Court Schemers.
Physical Conflicts: Red Court Vampires, Frost Giants, Whelp of Fenris, SWAT-teams.
Mental Conflicts: Psychomancy, Soulgazes, Torture, Partial Chronomantically-Induced Disorientation Disorder (PCIDD).
... and still they think that "If only I could get a <Sword of the Cross/Blackstaff/Physical Immunity (The Catch: Chocolate Pancakes)> I'd be much better equipped to deal with all this."
* unless I really want to.