See if these age-related estimates on your shopping tendencies match your own spending this holiday. They don't match my own personal impressions, but what do I know?

Based on the survey, released by Briabe Media,  shoppers under 30 are planning to spend more this holiday season than last. Those older than 30 intend to spend less.

Why would that age, 30, make any difference?  Most 30-year-olds are better off financially than those younger, at least in my experience.

The survey was conducted entirely via users of a site called MocoSpace, on their plans for consumer shopping. That site can't be a rock solid source; Alexa says it ranks at 1,080 as of Dec. 17 for all U.S. sites for Web traffic.

The results show 59 percent under 19 plan to spend more, 52 percent of 20-29 year-olds plan to spend more, but the majority of 30-39-year-olds plan to spend less.

It finds an even steeper drop the older the survey respondents are: 62% of 40-49 year-olds planning to spend less.

When it comes to mobile phone usage, 76 percent of respondents noted that their phone is “somewhat important” to “very important” to their holiday shopping this year. While 62% of respondents said they were likely to use their phone for product research before entering a store, only 46% use their mobile in-store for comparison shopping.

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