Why my sitemap does not index like other site.

Dear friends, I am worry about the site indexing process. My site mobileglob.com does not index before 48 hours. I post daily about 3 to 4 posts. And all setting is same like my other sites. They index in 5 to 10 minutes and some time in only minute. But why this site is not indexing well on time. I have also used xml sitemap for images and video but not succeeded. Please give some right suggestion for me. Thanks.
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