I created my account 1 hour ago and have this at 350mh/s

Current Hashrate: ~320 MH/s
469 shares
Lifetime Valid: 469 shares
1 shares
Lifetime Stale: 1 shares
25526 shares
Lifetime Invalid: 25526 shares
0.01301434 BTC
Lifetime Earned: 0.01301434 BTC
0.01301434 BTC
Balance: 0.01301434 BTC
06:54:02 UTC

Using cgminer, cgminer isnt even reporting back invalids. Is it even possible for me to generate that many shares in about 1 hour?