Daryl Mitchell and James Vince were in the runs again, while 16 wickets fell on day one between Gloucs and Kent.
Hampshire's James Vince hit his second ton of the season, while Saeed Ajmal made an instant impact for Worcestershire.
James Taylor helped guide the Nottinghamshire Outlaws to a six-wicket win over the Hampshire Royals at Trent Bridge on Tuesday.
Centurions Jimmy Adams and James Vince put on 233 as Hampshire crushed Scotland at the Rose Bowl.
Andrew Strauss says the 50-over format has showcased the best of young English talent.
Full-on Yorkshire are the pride of the County Championship, says David Lloyd, and deservedly so.
T20 Champions Lge