PSA: Samsung 840 EVOs still have performance issues

I've seen some builds, as recently as an hour ago, that have Samsung 840 Evo's in them. Just wanted to make sure folks realize that the performance restoration tool was not a complete fix. As an example, I have a 1TB 840 Evo -- just ran HDTach this morning and the average speed for the populated sectors was under 200MB/s. This is nowhere near as bad as the sub 50MB/s speeds pre-restoration tool, but this is still bad given the advertised speeds.

Anandtech wrote something about this which you can read here

If you're in the market for a new SSD, please take this issue into consideration and also consider your alternatives (Crucial MX100, Evo 850, etc).

Edit: Out of curiosity, if you have an 840 EVO, could you post which size drive you have, whether you're affected by this and what program you used to measure (HDTach, AIDA64, etc)?

Edit2: TL;DR from the comments -- it looks like a bunch of folks are experiencing this issue and a bunch aren't.

To clarify, this issue is specific to the 840 EVO line and is speculated to be caused by not properly compensating for the differences in TLC over MLC NAND memory -- that was original issue, as I understand it, and Samsung hasn't provided any sort of technical update. The 850 EVO's do not seem to be experiencing the same issue, but they're also using a different type of memory (3D TLC).

Edit3: <removed> apparently works Field Management for Samsung and has stated an updated patch is coming Q2/Q3 this year (according to reps from the product division). Take a look at his comments here and here

Edit4: This issue also apparently affects some 840 non-Evo units according to this. Also the original thread on overclock.net that started it all is here.

Edit5: As requested I've removed a username -- I'd rather not be responsible for someone getting fired ... He says he'll provide details if corporate/legal says he's able to.