Not Garfunkel:
Yes, HRE knows what he's talking about (well, mostly...). Particularly his second post, I would tend to agree.
The idea of "anaerobic training", or whatever else you may want to term it, is to make yourself tired with volume of speed workout. If you run, say, 200m too fast with too short of recovery, you may bomb out after 4 or 5 of them. That's not enough volume. You want to go at it for, say, 40 minutes or so TOTAL (including recovery jog whatever the distance or time may be). You can run them as fast as you want with as little of recovery as you want but most likely you won't get that volume. So you want to pace yourself. You CAN use longer distance like 800 or a mile but, naturally, the speed won't be as fast if you're, say, training for 1500m or 5k. You CAN do it but you may want to consider doing something shorter and faster.
The best success I had with this kind of workout was with this young lady last year; all I gave her was something like "run 1:30 fast down the trail and jog back... I want you to do it somewhere around 12~15 times until you hit the wall and you start to lose form and get into heavy breathing..." It worked well with her and she came back and told me; "I think I did 14 but I sort of lost count..." That's the way to go about. Then every week, I would shuffle things around like; okay, this week, let's run 1 minute fast...or next week, let's do 2 minutes..., etc. She did this type of workout, I think, 6 times throughout the season (I think Snell did "intervals" 9 times before Tokyo) and went out and PRed her 10k by 3 minutes, over a minute for 5k.
The part I'm curious about Alan's post is "3 mile race pace". He might have said it, though I highly doubt it. But if he did say that, I'm curious when he said it and under what circumstances. And it would show that I didn't know about Lydiard as much as I thought I did but I learnt something more today. Nevertheless, if he did in fact say it, I'd say that's one other thing I wouldn't follow what he had said because I believe "race pace" changes all the time (though "race effort" probably won't) and, by instructing one to run at race pace would put too much pressure. And, then it would become "number-oriented", not "feeling-based".