I've read those articles and the basic conclusion was that the new Delta 400 is better (in terms of grain) than the old Delta 400 and it's 1/2 stop faster (really ISO 400) but that the difference between the new Delta 400 and HP5+ is suprisingly small. They saw a very slight edge in favor of the new Delta 400 in terms of grain and speed. So while the new Delta 400 is very good and is better than the old Delta 400, it's not a quantum leap over "conventional" films like HP5+.(posted 8271 days ago)As I recall (and I may be wrong on this) they used D-76 for development (?), so there's the chance that a less "generic" developer might show larger differences.