lol yea, a statistic on a game bought by millions of people based on 200 votes tells a lot...
especially when made on a forum where most of the people come in to complain...
JUST...LOL
http://www.surveysystem.com/sscalc.htm
It is called sample size.
To use my poll as an example. If I plug in the results and use 5 million as the population size as a whole, then my poll results are +/- 6.79%... which isn't too bad for an impromptu poll.
Then you can look at other polls [below] on the subject of the magic system and you'll see the trend line is firmly against Skyrim's magic system, in favor of an Oblivion styled magic system.
http://www.gamesas.com/topic/1303444-excusion-of-spell-making-a-bad-developing-decision-and-why/
http://www.gamesas.com/topic/1345508-i-miss-spellcrafting-a-lot/
http://www.gamesas.com/topic/1345463-destruction-poll/
http://www.gamesas.com/topic/1336904-is-magic-worse-in-skyrim-compared-to-oblivion/
http://www.gamesas.com/topic/1332805-is-vanilla-destruction-bad-enough-to-warrant-patched-changes/
http://www.gamesas.com/topic/1314882-spellmaking-and-true-magic-vs-shouts/page__fromsearch__1
http://www.gamesas.com/topic/1325247-spell-creation-yes-or-no/