duke-one wrote:Maybe I could take this somewhat in another direction: Does a grinder for drip or press need to be as serious as an espresso grinder? It would seem to me that the extreme fineness and evenness required for good espresso performance would mean less for other preparation methods, true?
Duke
Good question. In general, I'd say you're correct, but you still need a decent grinder for drip and press.
The flavor of espresso is very sensitive to grind changes, which alter both the extraction and flow rate. Therefore, a good espresso grinder has to consistently produce the same particle distribution at any give grind setting. If it doesn't then flavor of the espresso is likely to be different from shot to shot, even though the grind setting hasn't changed. Not good. The best espresso grinders are very consistent.
Dip and press use a much coarser grind and are less sensitive to small changes in the grind setting. At given grind setting, a slight variations from one grind to the next won't be detectable in the flow rate or flavor in the cup. The grinder still has to be consistent enough to stay within the tolerance of the brewing method, but that's not as precise as is required of a good espresso grinder.
That said, even for drip and press, some grinders are considered better than others for more than just the consistency of the grind. A good burr grinder is always going to outperform a whirly-blade grinder. In general, larger burrs outperform smaller burrs, even for brewing methods that use a coarse grind. Consistency may play a part, but there's probably something in the particle distribution as well. Unfortunately, the data on particle distribution isn't very good, so it's hard to draw conclusions about what makes one particle distribution (or grinder) better than another. You can read all about the problem
here. Don't worry if it makes your head spin. Some of the discussions here on HB are like that

.
In a more practical vein, I use a "Titan Grinder", a Compak K10 WBC, for espresso. It's one of the best and most consistent espresso grinders you can buy. I use a Baratza Vario for drip. The K10 can grind coarse enough for drip brewing, but I prefer to use it only for espresso (superstitious, I guess, and my dealer recommends using espresso grinders only for espresso.) The Bratza Vario is very good for espresso, though not as good as the K10. But it works very well for drip coffee. It's very consistent and the coffee made from its grounds tastes great (mostly because I try to buy great coffee.) Most important, however, is that it's much easier for my wife to use when she makes her morning pot of drip coffee. I feel it's an excellent compromise between quality, cost and ease of use.
So, the bottom line is that, for home baristas, it's not necessary to go to the Titan class of grinders for drip and press coffee. Cafes, on the other hand, would want to use one of the high-quality industrial grinders designed for those brewing methods.