1 and 1 is pretty much the standard in all handicap leagues, nationwide. I believe it is also standard in most scratch LEAGUES. 1 pair and 1 pair works if done properly, but most folks don't and thereby take way too much time to bowl a typical 5 man league. Lately I've been having some issues with seeing folks 2 lanes over - it's my problem (concentration most likely) and I will not ask for 2 lane courtesy. (BTW, it's properely 1 pair, not 2 lane).
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"I do desire that we may be better strangers." Willie the Shake, As You Like it(III,ii)