Yes, I would say this is true for me. Particularly with the economy right now - I can't afford to buy new clothes if I gain weight. And yet, with the economy, I also can't afford to overeat.
This year I made it through Halloween, Thanksgiving, and Christmas without overeating and overdoing it, and gained no weight. But in the past few weeks - with all the nasty weather we've had (we're at 46 inches of snow and the average for us is 22 inches by this date!) - I've been in this overeating stuff-that-isn't-good-for-me slump. Exercising? Forget it. I don't like exercising indoors, and this weather is so nasty it is hard to get outdoors and take a walk. I've felt extra-squishy as a result, and it's subtle, but I can tell a difference in how my clothes are fitting.
So this past week I've made an effort to curb things a bit. Nothing drastic - just a few less calories here and there, ease up on the sweet treats, eat more veggies. I find it's a lot easier to make minor tweaks than major ones.
The most recent research - if you want to trust in it, and I'm not sure I do - says that diet is more important than exercise, when it comes to weight loss. It's probably misleading because muscle weighs more than fat, but takes up less volume... so yeah... if you lift weights you can stay the exact same weight but shed clothing sizes.
At any rate, I always expect to gain a few pounds over the winter. I think in colder climes like ours, it's inevitable. I think our bodies are designed to pack on a few pounds over the winter, and then shed them when warmer weather hits. It's one of those survival/biology deals. So I'm okay with a few pounds - I know it'll come off when the weather warms up a bit and I can walk outside without breaking my neck slipping on the ice. But not enough weight to necessitate a whole new wardrobe. Make sense? (or am I rambling again...