Thing is, Haste DOES help affliction, for the reasons pointed out. Less GCD=get your DoTs up faster=more SBs, and the SBs are faster due to haste also. Also, it is quite apparent to me that SB will STILL be 40-60% of an Affliction Locks damage. With talents like Eradication, improving our casting speed on SB even further for having DoTs up, Everlasting Corruption, so we don't have to refresh it, therfore getting more SB time and haste allowing us more SB time, I see that 40-60% going up, to at least 55%+. Therefore, Haste allows us to get more SBs in, and SBs do scale extremely well with Haste. So over half our damage will definately scale with Haste, as for the other half, we have talent like Pandemic to help our DoT's scale better with gear.
With the probably insane numbers of Spell Dam and +Crit that we will be seeing in Naxx(My guess is that 35-40% crit will not be too uncommon, seeing as some Sunwell Lock's already approach the 35% mark), Pandemic and Haunt will make up the difference easily, putting us on par with the Destro guys, especially with a Felhound out, damage dealing mana battery. Destro doesn't get a mana battery, so after they life tap, they may have to use another GCD for HS/Pot or even spend time bandaging, we won't. All these factors bring Destro and Affliction on par already, if DoTs scaled with Haste more than they already do, that would put Affliction way over the top and they'd have to tone down the DoTs.
Now that I am in the beta, hopefully I can get into a Naxx run next week, hopefully there will be a lock of opposite spec from me to compare to, and hopefully there are functional damage meters for the beta, and I can show you some real evidence to support Jenova's Maths(that I know are right).