MainzMan:
Golf courses are traditionally measured in yards, it's unlikely WGT is going to change anything any time soon.
I agree to the second part but I beg to differ concerning the "traditionally yards" thing.
It may be true in the UK (against federal laws AFAIK) and in the USA (no comment), but I suppose that in the German golf tradition of more than 100 years, distances have always been given the metric way. This is a fact in presence, for sure! On my travel itineraries, there has been not a single European or North African course south of Mullion Golf Club (Cornwall, closest to Lizard Point) showing yards - all were in meters.
(edit: Jersey and Guernsey might beat this latitude)
@DDeSmedt: Don't worry about yards or meters, it doesn't matter if a drive lands at 250 yds or 250 m - all is relative!
About the difference in lower ranges, it is as Courteney states: Get used to the conversions, it will become easier as time passes. You may get trouble calculating tapestry in meters before you become a Legend ;)
And, consider the positives in those rules of thumb: on the putting green, 3 inches of elevation are worth one foot of length (imagine a 7.5 for 31 cm or 1 : 4 metric conversion), and from fairway, 3 feet of elevation are worth a yard difference (o.k., that is 1 / 1)