Yahoo Finance is better if you want news and other infotainment to go along with your quotes. If you just want data, G Finance is significantly better and is the go-to resource for sophisticated investors/traders etc.
What I think you meant to say was 'unsophisticated market participants choose Yahoo Finance' in which case you're probably correct.
Your 247wallst.com source aside, I stand by what I said. Go to any online community related to investing, trading or the stock market and you'll find nearly all of the people who know what they are doing prefer G Finance to Y Finance - other than for news and infotainment, where Yahoo does a much better job.
If your traffic figures are accurate, that only goes to show you how many unsophisticated market participants there are.
Do all the day traders in the Y! Finance message boards qualify as a "online community related to investing"? Do you think they prefer Google Finance? Probably not.
I'm not saying Google Finance doesn't have value, I'm just saying the burden of proof is against you since everything out there points to the opposite of your statement.
As one of the people said on Quora the daytraders are there for the forums and they stay for that reason. If HN started trying to compete with Netflix and I kept coming here, that wouldn't mean HN's streaming videos were superior to Netflix.
Woah, you couldn't have this any more backwards. Google Finance regularly publish bad price and fundamentals data, including for their own ticker. It's been that way since launch. Their database is also full of stub companies that haven't traded in decades (with no useful information attached).
If you spent more than a few days using it you'd know this.
I use G Finance for at least an hour a day and have for several years. Y Finance I only use for news (which they do quite well).
Can you share some examples of this bad data you speak of? I've never seen it. My quotes are always accurate and very close to real time - much faster than Y.
Also, the Google Finance Android app couldn't bring up the US listing of Hitachi, which is pretty bad.