The following table shows how these changes have effected the size of downloads:
| Week / Action ||Bytes Transfered||Sessions||Bytes / Session|
|Week 1 - no image changes||2.50 GB||6,969.00||376.45 KB|
|Week 2 - striping EXIF data from thumbnails||1.81 GB||7,459.00||254.95 KB|
|Week 3 - striping EXIF data from all site images (minor design changes)||992.98 MB||8,459.00||120.20 KB|
As the number of sessions has increased over the period I've used the Bytes/ Session to calculate that stripping the EXIF data from all images has resulted in a saving of approximately 30% (this figure is likely to be effected by the new lighter site design).
These changes have resulted in the site loading much quicker, especially the collection pages that contain a lot of thumbnails.
Those looking for others reason to strip EXIF data should read about this "incident", that resulted in this advisory.