AFAIK everyone spikes after eating, and there are a number threads where diabetics on the forum have tested their non-diabetic partners after various meals, and the results have been quite interesting.. Do a forum search if you're interested.
There are
some guidelines issued by NICE, here on the main Diabetes UK site which might be useful, but remember they are
guidelines.
I'm on a very low carb diet, and my readings are usually under the
non-diabetic post-meal levels, but I'm often up towards the top of the type 2 pre-meal levels. We all have our own different battles to fight so there's no point in worrying over what someone else is doing or achieving, and it's worth remembering that many of our members are
pre-diabetic which probably helps with their better/lower levels. Many people set their own targets and if they are getting good results they may feel they can do even better, so you need to set your own realistic targets (possibly together with your doctor), and aim for those. When or if you reach them, then is probably the time to think about setting lower ones.
Robbity