AMD is not catching at all to Intel at the moment. Actually, the gap is only getting bigger. AMD's latest and greatest can barely compete on performance with Intel's from about 6 months ago (their 6 cores/socket < 4 Nehalems). The Nehalem EX will be the final nail in the coffin. AMD's problem is that it is slowly bleeding $$$ every quarter while even in this tough economical times Intel still makes $1billions dollars per quarter (that's profit).
Not entirely true with the Phenom II, they aren't too far off the older 65nm intels. If you want to get the best from it you will need to overclock it a good amount. Those 955 Black Editions overclock rather well and once overclocked aren't too far off most things intel offer.