With March spring-fashion issues closed and on their way out the door, we can assess who’s winning and losing the Great Ad Page Race of 2011. WWD has the numbers, and People StyleWatch is in the lead with, in fact, its largest increase ever of 46.5 percent for a total of 197 pages for March. Not quite nipping at its heels, but finishing more than respectably, is Elle, which saw a lovely 14.3 percent ad page increase for a total of 517 March pages. Close behind is Women’s Health, hollering at a New Year’s resolution dieter, with an 11.7 percent increase to 117 pages. Almost keeping pace is InStyle, still in the race at a 10.9 percent increase for a 489.5 page total. And don’t forget about Vogue, which will have Lady Gaga on the March issue, with a 10.6 percent uptick to a nice fat 617 pages.