NOT all, but a majority ....yes. Don't get too gun ho on this ...the blog has no PR rank.....now get busy building backlinks to the blog, then you might see a PR0 or PR1 soon. Once you get PR 0 or 1, thats when your blog begins to show up in search engine ranking positions (SERP), for your targeted keywords. get to work!
i too have noticed the same with my posts ... from last few weeks i have been watching my posts getting well crawled in google and also seen good serps of the same ... but posts on blogspot blogs are much more quickly crawled then other ones ...
well its not big deal google blog search is updating after every 15 minute So site those have rss feeds they get index very fast
Congratz but its because you are on blogger, what i have observed is a post at blogger is indexed faster than a post on a non-blogger blog and its because when you ceate a post on blogger and you have ping weblogs enabled it pings and let google know that your blog has been updated , and than spider come in to your blog and you page is index in 2 minutes.