I use both Google Webmaster Tools and Attracta to submit my sites for indexing. A recent new site that I just launched was index in 1 day. But I have had sites take a few weeks to get fully index. It may depend on how many pages are on your site and if they are dynamic or static page.
Its happening to me before my site can be index in few minutes or hours.. but now it takes a week..
But if you direct to their google web submit url they can index it in few minutes.. 1 by 1 unlike before that after you post it takes few minutes to index.
I think reason can be lots of update or anything else ?
Yes, i have also seen it, indexing process is slow and slow for every sites.
Try to crawl your site with any platform to get information about some errors in parameters of your site