Frequency/market practice: Repeating or "bringing-down" representations at closing is very common..
Frequency/market practice: Representations and warranties are almost never repeated at all times between signing and closing.
Frequency/market practice: Bring-down certificates at closing are common.
Frequency/market practice: Both the accurate 'in all material respects' standard and the Material Adverse Effect standard are common. There are often carve-outs for fundamental representations which must be true 'in all respects'.