Sadly there are too many unknowns on where the partitions were on the drive before this all happened, what file types, how were they deleted, were they reformatted, did Win7 auto-create a recovery partition?
Then there are the knowns of deleting, recreating and overwriting on the very medium you are wanting to recover from.
There will be only one way to find out - suck it and see.
But realistically, the files with the best chances of recovery will be the ones furthermost away from centre of the disk and with no activity since they were last accessed. But even they have now lost their address allocations, so if they were fragmented, you are only at best going to get back bits of files which you'll have to 'stitch' back together, for those types that can be.