Mrz - I hope you don't mind if I copy your classic indicators onto a Yahoo Support Group in the States that I am involved with. I think they encapsulate the differences.
Some of the points you raise really stand out as contributing to reading difficulty - ie points 8,9,10.
point 1 - a 'linguistic/synthetic phonics' programme such as Sound Reading System has a superb record in teaching spelling skills logically (prison, youth offender centres as well as primary schools).www.soundreadingsystem
point 2 - is completely eliminated if a child is taught to track left-to-right and rigorously maintains this discipline right from Reception/Year 1 (see piperbooks.co.uk -nb I am involved. It's likely that eye muscles are also strengthened and 'convergence' problems lessoned or eliminated in many cases.
point 3 - i'll pass except to say that I had the classic case of a 7 - later 8 year old- unable to comprehend either days of the week or to understand that he didn't come to school on Saturdays...
It took a long time with Synthetic Phonics (they mixed all sorts of strategies in the school)and I only had him once a week, but he ended up really enthusiasic about his reading. His 2 older brothers are still stuck with semi-literacy skills, I believe.
point 4
if you use a 'slider' - ie sliding along the graphemes using a card as the child says the sounds, this problem is eliminated. see www. Promethean Trust [they call it a cursor].
point 5 - b d confusion
this just doesn't happen when 'b' 'd' are introduced a long way apart. Also, Debbie Hepplewhite's instruction to always start on the line helped the children I tutored enormously - when I was a remedial teacher. Many 6,7 year olds had 'b' 'd' confusion
point 6 - pass - but a good observation
point 7 - poor concentration is greatly exacerbated when a child doesn't understand the alphabetic principle - some children take a long, long, time and much practice (I'm sure you know this....)
point 8 - yes, I think that it will always take longer
point 9 a huge amount of overlearning and patience is needed.
point 10 and 11 - already covered.
Thanks for the patience - if you've read to the end!