Thanks, but no.
For some reason I can't just glance at an isolated not and 'see' what it is. I have to 'work out' which line or space it is on, then translate that to a note, then decide if it needs to be sharpened or flattened. That's too slow for reading.
To an extent I can, once I have found a note, follow the ebb and flow up and down, but if there's a big jump I have to work it out. To some extent I can memorise what one place is, but after a while it fades again. And even if I 'know' that the middle line id D (I don't, I had to look it up) it takes me a finite amount of time to work out that the note is on the middle line.
The more I try the more obvious it is that my problem is not memorising what notes are where, its actually working out where the note is on eth stave that takes the effort. I think it's like word-blindness.
To a degree I can 'read' tab although most tab makes a pig's ear of the rhythm, but sometimes I still get 'lost' and play the wrong string. Fortunately the bigger tonal gaps between tab lines mean I usually 'know' pretty much where I should be playing so I find tab easier.
I suspect my personal experience isn't that of many others.