The E10+ players are working to learn and clear E10 NYR just like they did for E5 NYR many months ago. When that happens, the E10+ players are not going to want to run E5 until after they clear E10. This will mean less opportunities for people who are not E10+ to run with E10+ players on NYR E5 clears.
So to me it makes sense, and I think Gyl and Keeper agree, to differentiate between an E5 run that's expected to be a fast clear with mostly experienced, well geared players with 1 to 2 people learning (tanks and healers) or being carried (lower dps players), so that more people in the cabal are capable of fast clearing NYR E5. The NYR E5 learning runs should have a few experienced, well geared players volunteer to join to help teach people trying to learn the fight or people who are still a bit low on tanking, healing, or dps to learn the fight and improve so they can help to fast clear it too.
I agree with AWOL that anyone can derp, or have lag, or have a computer crash etc., but other than tanks and healers if you have many 10K plus dps in group with experienced, well geared tanks and healers you are going to clear fast unless the tanks or healer derp, lag, DC, or crash. Watching ACT is not something that causes wipes in NYR E5. Misplacing filth, dps that's too slow so you have too many golems / adds and too much filth in phase 3 or your run out of time, and either a tank , the healer, or too many dps dying are the primary reasons for wipes. Derps, lag, DCs, crashes, etc. are just another way players can die, but they are random and cannot be anticipated like experience and gear (or you can say mitigation, hps, or dps) and typically if someone critical (tank or healer) is having bad lag, DC's, or crashes they will ask to be replaced so the raid can be successful.
In any case, creating fast clear vs. learning designations on raid groups is an idea that seems to make sense to me because everyone goes in with the same expectations. However, if it's too hard to do logistically or people think it would hurt someone's feelings (not sure why it would), then we can skip it. I think it's a good idea and appreciate the comments and feedback pro and con.