Hey mate, I know this is worrying, but there's the most positive thing is that the post-surgery scab removal looks extremely good at Day 12.
Are you a fast grower, no... but you're not so far behind that it's unreasonable. Hopefully month 6-9 will be a turning point. I'd take some real close ups on a high quality camera phone, I'd imagine seeing new growth would help alleviate some of the stress. The quality of images is poor so at times it can make growth look a little worse. Still feel this will be a good result, but you're just a little slower.
Keep us updated and keep your head up, this will be fine.