bloupbloup - 7:46 am on Jul 19, 2012 (gmt 0)
3. Before i had sitemaps. And i used to look into the number of submitted pages versus the number of index pages in webmaster tools. I did not witness any increase in indexing after the submission of the sitemap. Everyone can check that. Submit xml sitemap, check it once again after 3 days, you will see there will be no change. However in the log, googlebot visits those files. However, i don't see the benefit of it.
I double checked in google results. XML sitemaps did not help to index any URLs faster.
4. for people who have a news website with lots of posts, they don't need xml sitemaps. They just need to link their twitter account and post a twitter automatically when they submitted a new article. they may also submit this article to other social medias. They may use a solution like networkedblogs. That would be a way better impact than using a sitemap.
5. by the past, i also thought that XML sitemaps helped to get rid of parameters at the end of URL and provide the right URL to googlebot. I have understood it also did nothing. I thought sitemap would prevent to visit URL i did not wantand do the canonisation. I was also wrong. In fact, i discovered that there are so many urban legends around XML sitemaps. that's why i extensively tested it but i have never been able to find any benefits.
I guess there is some politics involved and the sitemap team at google wants to keep their job. I guess it would be more beneficial if they would work on valuing pings to social medias and get rid of xml sitemaps.