Yes it normal on the 335d to shift at around 4500rpm to 4600rpm doesn't matter if you're in D or M mode. Road and track talks about it in their May 09 issue.
2001 Phoenix Yellow Integra Type-R (Track Car "Road Course")
2008 Black 911 GT2 (New Track Car "Road Course")
2009 Le Mans Blue E90 335i 6MT M-sport (Built date: 7-09) (Daily Driver) "SOLD"
2012 Palladium Silver Metallic ML350 BlueTec